Time Out says
Adam Watstein's pitch probably went something like "It's Curb Your Enthusiasm meets The Anniversary Party, with a smidgen of The Player." But he forgot to mention that his project would have none of their charm. The back story is intriguing, though. The film was entirely improvised by a seven-member cast; each actor was given a set of "objectives," and no second takes were allowed. After eight consecutive hours of shooting, a movie was born. Unfortunately, it isn't a very good one—this low-budget skewering of Tinseltown is derivative, superficial and way too long, even at just over 90 minutes.
Jason (Mellis) and Catherine (Chapman) are married filmmakers from New York who moved to California after having a hit at Sundance. As they prepare to host their first L.A. dinner party, they bicker about their relationship, their stalled careers and what kind of pasta dish to serve. The guests slowly start to arrive: Keith (James Tupper), a struggling actor; Charlie (Kevin Chamberlin), a shady producer, and his plucky assistant, Kim (Kit Pongetti); and Blake (Bell), a has-been Parker Posey type. Although everyone is ostensibly there for pleasure, it's all pretense, and as the night wears on they flirt and fight, make and break deals, and discuss their tangled pasts—everyone's basically screwed everyone else, both literally and figuratively.
Although the acting is fine and some of the lines are amusing, Loudmouth Soup fails to offer any new insights into the human condition in Hollywood, and doesn't even have celebrity cameos to keep it interesting. (Opens Thu; Pioneer Theater.)