Cocktail bar Rosina opened at the Palazzo Las Vegas in December. The new venue offers guests an opulent atmosphere with shades of black, gold, pearl, and burgundy, presented in decor and furniture such as crystal chandeliers, high-top tables, U-shaped banquettes, and an 1,100-square-foot bar that resembles a jewelry box. The bar’s signature feature is a “Champagne Call Button,” a button on a mirrored column next to their table that guests push when they would like a refill. The venue seats 65 guests and is available for private events.