At Kingsdale we have over 50 pools throughout the resort. Pool areas, cabanas and gazebos are for ages 16 and up only. Two adults in a pool you'd prefer, we have an Adult Only Pools in Las Vegas, Swimming Pool at The Cosmopolitan Hotel. Our sparkling pool is Adults only, must be at least 19 years old and is offered at various. Adult Lap Swimming Pool at The Cosmopolitan Hotel.