Frozen Harbor Music Festival: A slate of the hottest music around anywhere, just the thing for a (potentially) cold wintry weekend. Performers (more than 140 in all!) include Onyx, the Pietasters, Joe Pug and a group of guys who go by the name of Dru Hill. (Hey, any chance to hear them play live has got to be worth checking out, right?) Venues include Rams Head Live, 20 Market Place (where Dru Hill is playing at 10:30 p.m. Saturday), and Baltimore Soundstage, 124 Market Place, plus other Power Plant Live locations. The festival-going started Friday and continues at 3:30 p.m. Saturday. Information at frozenharbor.com.