Eight self-absorbed thirty-something Los Angelenos gather at that yuppie-est of conventions: the Sunday couples brunch, held at the lavish home of the brittle, bickering married pair Emma (Erinn Hayes) and Pete (Blaise Miller). The guests are uptight medic Tracy (Julia Stiles), who’s on her third date with prudish schoolteacher Glen (David Cross); tattooed hedonist Buck (Kevin M. Brennan) and his bird-brained, equally unfettered