Tired of the same old co-workers? Haven’t been invited to your fair share of holiday parties? Well, Christina Ewald and Fritz Donnelly are cordially inviting you to Someonelse’s Office Party. The duo, who together make up the performance-and-party-hosting entity known as HiChristina, will assemble troops of partygoers at their Brooklyn headquarters tonight. They will then issue disguises and lead the group to a series of office parties that they were sort of, but not really, invited to, and hopefully won’t be kicked out of. Even if you do make a fool of yourself, you’ll never have to face these people around the water cooler when you return to your own office.

Sat., Dec. 12, 9 p.m., 2009