If the Top Picks are scaring you this week, consider taking refuge in this: The U.S. Air Force Band of the West boasts a number of ensembles, two of which will perform free concerts over Fourth of July weekend. Dimensions in Blue, a jazz ensemble, plays Schertz’s Pickrell Park on Saturday, and Top Flight, a pop ensemble stationed at Lackland Air Force Base, plays Woodlawn Lake Park on Sunday. Free, 1pm Saturday, Pickrell Park (corner of Brooks Ave. and Oak St.) Schertz; 7:30pm Sunday, Woodlawn Lake Park, 1103 Cincinnati.