Las Vegas: Pool at Cosmopolitan hotel-casino to reopen March 5 Kristen DeSilva, KVVU-TV · February 22, 2021 at 11:00 pm The pool at The Cosmopolitan of Las Vegas will reopen on March 5, the property announced Monday. The Pool Marquee will be open to guests 21+ with reservations. A statement from the property said they will offer expanded seating areas and new bungalow cabanas. The news comes as Gov. Steve Sisolak recently announced a timeline for easing capacity restrictions on businesses. The pool will be open 11 a.m. to sunset each Friday, Saturday and Sunday.