>> The Black Cat’s backstage is going to be pumping out the punk noise tonight as Antelope stops by, with Thank You and The Andalusians. $8, 9 p.m. >> DC Scores, a local nonprofit that provides innovative after-school programming to Washington kids, is hosting its 10th Annual Poetry Slam tonight. The event will feature 300 of the District’s public elementary and middle school students competing for the coveted Golden Mic trophy — obviously it…