Help preserve the Washington Free Clinic and check out some of Washington’s up-and-comingest post-punk bands into the bargain. Billed for this Positive Force-sponsored benefit are Girls Against Boys (New York-based these days and reportedly headed for a major label), Norman Mayer Group, Your Majesty, and the Warmers. The all-ages, early-evening show begins at 5 p.m. at St. Stephen’s Church, 16th & Newton Sts. NW. $5. (703) 276-9768. (MJ)