Several fun options around West Seattle tonight: “Grease” at Sidewalk Cinema next to Hotwire (we’ve been to these fun outdoor movies twice this summer and had a blast both times); “Once Upon a Mattress” in the West Seattle High School theater (billed as partly a fundraiser for the relatively new and lively Youngstown Cultural Arts Center); the last night of “Cabaret” at ArtsWest; and if you venture a little further southwest to White Center, sounds like one heck of a bash till 10 pm tonight at Pacific Rim Brewing Company, featuring more than half a dozen bands and the inimitable Rat City Rollergirls.