Mash Hall’s (formerly They Live) goofy sci-fi-spliced rhymes are one of the best things Seattle hip-hop’s got going on right now, but instead of coasting on that momentum, emcees Gatsby and Bruce Illest have decided to put down their mikes for now. Fortunately, like most musical retirements, this one is open-ended: the duo claims that their departure is more along the lines of, say, Jay-Z’s or Ted Leo’s or 50 Cent’s (read: not a retirement at all). But since nothing’s guaranteed in this life, it’ll be worth catching the show — and downloading Mash Hall’s back catalog — just in case. With Butts, SSP. SARA BRICKNER

Fri., Oct. 29, 9 p.m., 2010