LAS VEGAS >> Slot machines are now ringing at the boutique hotel replacing Bill’s Gamblin’ Hall & Saloon in the heart of the Las Vegas Strip.

The Cromwell celebrated its soft opening Monday evening by welcoming guests into a 40,000-square-foot casino featuring 434 slot machines and 66 table games.

The hotel’s 188 rooms and suites are not open to the public until May 21, but the gambling area, the Interlude cocktail lounge and the Curios retail shop are open for business.

Caesars Entertainment spent $185 million to transform the Old West-style Bill’s casino into The Cromwell, adding hardwood floors, black and white tile shower walls, and plush seating to the hotel rooms.

The Cromwell will also include a restaurant by celebrity chef Giada De Laurentiis, a rooftop pool and Drai’s day and nightclubs.