othing brings 20-somethings together like a game of billiards and the newly renovated Felt nightclub (formerly Diamond Club) can boast that it's the only billiards hall within 30 miles of South Beach with 10 official regulation-sized tables. Managers Robert Sibel and Dwight Nelson have toned down the chic and sophisticated and turned up the relaxed and comfortable with an updated lounge area and a full liquor bar.