David Tonnessen/Pacific Coast News
03/09/2012 AT 05:55 AM EST
hit West Hollywood's Chateau Marmont and instead of his usual outlandish attire, was dressed in a dapper three-piece suit. The actor joined a table of four people and sipped water, eventually removing his coat to just chill in his vest. Arquette was rather low-key, according to an observer, just listening to his friends' conversations and responding occasionally – but mostly just enjoying their company.