We’ve all got one, usually stashed away in a closet for 11 months of the year. An ugly Christmas sweater is a requirement for any self-respecting partygoer, and this weekend, you can don that tacky turtleneck or crass cardigan for a good cause at the Ugly Sweater Party Fundraiser for Fire Relief. The night’s musical offerings will have you sweating on the dance floor with performances by Akil of hip-hop group Jurassic 5, DJ RAAMM, Sanho the Indian and Tommy Odetto. Ticket proceeds go to fire victims, so dress up ugly and party down on Friday, Dec. 22, at JaM Cellars Ballroom, 1030 Main St., Napa. 8pm. $20–$50. 707.880.2300.