I'm all for hearing an acoustic rendition of Bill Withers's "Ain't No Sunshine" echo through the CTA underworld, but how often do you get to encounter the Bruno Mars vocal hook from B.o.B.'s "Nothin' on You" being banged out on a steel-pan drum? Joseph Glenn offers commuters a nice change of pace from the usual guitar-slinging train-stop performers. His tinny steel-pan jams—some improv, some covers—are backed by the thump-thumping beat that bounces out of his small white amplifier. Subway stations are typically depressing places, full of business-attired commuters with their noses deep in smartphones. But the couple of times I've caught Glenn at the Clark and Lake Blue Line stop, he's created a warm, copacetic Caribbean vibe—until the clunky, loud-ass train rolled in.