The Cosmopolitan age and kids policy: who can stay and where rules differ
The Cosmopolitan Of Las Vegas is an all-ages resort: children of all ages are welcome to stay as long as at least one registered guest checking into the room is 21 or older. Some onsite areas have stricter age rules — most notably the Marquee Dayclub/Marquee Nightclub (21+), while the Boulevard and Chelsea pools and family-friendly restaurants are open to guests of all ages.
In this guide
How the age policy works at a glance
The Cosmopolitan Of Las Vegas accepts guests and families with children of all ages, but every reservation must be booked and occupied by at least one adult who is 21 or older. A valid photo ID and credit card are required at check-in.
The property mixes family-friendly amenities with adult-targeted venues (casino, nightlife, certain pool spaces). Expect standard adult ID checks at age-restricted entrances and at check-in.
- Minimum age to check in / book a room: 21 with photo ID and credit card
- Children of any age may stay in rooms when accompanied by an adult 21+
- Some areas (casino, Marquee Dayclub/Nightclub) require guests to be 21+
| Rule | Who it applies to |
|---|---|
| Check-in minimum age | 21+ (one adult in the room) |
| General hotel access & pools (Boulevard/Chelsea) | All registered guests, any age |
| Marquee Dayclub / Nightclub and casino gaming | 21+ only |
Check-in, reservations and who can book
Standard check-in time at The Cosmopolitan Of Las Vegas is 3:00 PM and check-out is 11:00 AM. At check-in the hotel requires a photo ID and a credit card; cash may be accepted with prior approval up to a specified limit.
Every room must be occupied by at least one adult aged 21 or older. If you are traveling with children, ensure the booking name is of the 21+ adult who will present ID and card at arrival.
- Standard check-in: 3:00 PM; check-out: 11:00 AM
- Photo ID and credit card required at check-in
- A room must have at least one guest aged 21+ on arrival
| Reservation detail | What to provide |
|---|---|
| Who checks in | Adult 21+ with photo ID & card |
| Families with children | Children allowed but adult 21+ must check in |
| Payment options | Credit card required; limited cash accepted with prior approval |
Pools: which ones allow kids and which are adults-only
The Cosmopolitan's Pool District has three distinct pool experiences: Boulevard Pool, Chelsea Pool, and Marquee Dayclub. The Boulevard and Chelsea pools are open to registered hotel guests of all ages, though some pools run on seasonal schedules and may close temporarily.
Marquee Dayclub (which converts to Marquee Nightclub after dark) is an adults-only area for guests 21 and older and typically operates as a ticketed or VIP experience when open.
- Boulevard Pool: hotel-guest access; seasonal hours (subject to closures)
- Chelsea Pool: typically the year-round hotel pool option; open to all registered guests
- Marquee Dayclub/Nightclub: 21+ only; ticketed/seasonal and can convert to nightclub at night
- A room key is required for entry to the pool district
| Pool | Age access | Notes |
|---|---|---|
| Boulevard Pool | All ages (hotel guests) | Seasonal schedule; check current hours |
| Chelsea Pool | All ages (hotel guests) | Typically year-round option |
| Marquee Dayclub | 21+ only | Adults-only, ticketed/VIP when operating |
Rooms and suites for families
The Cosmopolitan offers a variety of room types that accommodate families and groups. Room names you can book include City Room, City Studio, Terrace Studio (and Fountain View options), Terrace One Bedroom Suite (and Fountain View), Terrace Suite Fountain View, Wraparound Terrace Suite (and Fountain View), Two Bedroom City Suite, Restore Lanai Suite, Executive Suite, Bungalow, and Chelsea Penthouse Two Bedroom.
Rooms with two beds or multi-room suites (for example City Room with 2 Queen Beds or the Two Bedroom City Suite) give families more sleeping space. Rollaway/extra bed availability and fees may apply.
- City Room — options: 1 King Bed or 2 Queen Beds
- Terrace Studio / Terrace One Bedroom Suite — single King Bed options and terrace access on some room types
- Two Bedroom City Suite and Chelsea Penthouse Two Bedroom — two-king configurations suitable for families needing separate sleeping areas
- Rollaway/extra bed fee may apply (hotel-listed fee applies)
| Room type | Typical bed setup |
|---|---|
| City Room | 1 King Bed or 2 Queen Beds |
| Two Bedroom City Suite | 1 King Bed (listed — multi-room layout) |
| Chelsea Penthouse Two Bedroom | 2 King Beds |
Spa, fitness and age restrictions
Sahra Spa, Salon & Hammam is the property's main spa facility. Spa facility hours and appointment windows are published; the spa is generally available to guests 18 and older. Salon services may be available to guests under 18 when accompanied by an adult.
Hotel fitness centers and the Chelsea Tower tennis and pickleball courts are included with the resort fee for registered guests, though specific fitness-center hours vary by location and a hotel key is typically required for access.
- Sahra Spa, Salon & Hammam access: 18+ (salon services for under-18s when accompanied by an adult)
- Fitness centers: hotel-guest access; Boulevard Fitness Center is open 24 hours and requires a room key
- Tennis/pickleball courts: available at Chelsea Tower fitness facility (hours posted onsite)
| Facility | Minimum age |
|---|---|
| Sahra Spa (treatments / hammam) | 18+ |
| Salon services | Under 18 allowed when accompanied by adult |
| Fitness centers / courts | Hotel guests (age rules vary by program) |
Dining, bars and gambling: what kids can do
Many of The Cosmopolitan's restaurants welcome children; casual options like Eggslut and Wicked Spoon are commonly used by families. Children can dine at most on-property restaurants, but specific menus and hours vary by venue.
Bars, the casino floor and nightlife venues require guests to be 21 or older. If you plan to visit The Chandelier, Vesper, Marquee Nightclub, or the casino, everyone on the gaming floor or in those venues must present valid ID proving they are 21+.
- Family-friendly dining available: Eggslut, Wicked Spoon and several casual outlets
- Dress codes and hours vary by restaurant (check with concierge or reservations)
- Casino floor and most bars/nightclubs: 21+ with valid ID
| Venue type | Age policy |
|---|---|
| Restaurants (general) | Children welcome; hours/dress codes vary |
| Bars / lounges / nightclub | 21+ only for entry and alcohol service |
| Casino floor | 21+ only to gamble |
Practical family travel tips
The property charges a mandatory daily resort fee (details available from the hotel) that covers in-room WiFi, local/domestic calls, digital newspapers/magazines, 24-hour fitness access, and tennis/pickleball access. Parking options include covered self-parking and covered valet (fees apply).
Pets: The Cosmopolitan allows up to two dogs per room for a fee (cats are not permitted). Service animals are not charged a fee. If you have specific accessibility, pet, or childcare needs, contact the hotel or your booking agent ahead of arrival.
- Resort fee includes in-room WiFi, calls, digital newspapers, fitness and court access
- Covered self-parking and valet parking available (fees apply); EV charging via valet
- Pet policy: up to 2 dogs per room for a nightly fee; cats not permitted; no fee for service animals
| Item | Practical note |
|---|---|
| Resort fee | Covers WiFi, calls, digital content and fitness/court access |
| Parking | Covered self-parking and valet are available for a fee |
| Pets | Up to 2 dogs per room for a fee; service animals exempt |
