MONDAY: >> The definite must-see show this evening is sure to be Q and Not U’s performance at Fort Reno. As we reported earlier, the band is breaking up, and this concert will be one of their last. But if you can’t make it tonight, don’t worry too much – they’re playing shows at the Black Cat September 22 and 23. Tonight, the politically-charged hip hop group Son of Nun opens, and the music gets…