Voted #1 STEAKHOUSE by Zagat and Best of Philly The Prime Rib offers the finest in American steakhouse cuisine in a classic 1940s Manhattan supper club ambiance. Jazz nightly. Business casual, no jacket required. $45 three-course menu with choices offered 4:30-6 p.m.. Civilized Happy Hour Monday-Thursday with special drink and bites menu 5-7 p.m. Dinner 7 nights a week.