Remember those dances in school where boys and girls stayed on their respective sides? Chalk them up to experience. It’s time to grind up on a good time for a good cause. Join PROJECTMILL as they host their dance party, Back to School_MF, at Northside Tavern. The event is free but hoofers are asked to bring donations that benefit local school children. Feel free to pack notebooks, erasers, binders, backpacks, 24-packs of crayons … you get the idea. Just don’t forget to pack those dancin’ shoes. And for my fellow catholic school brethren, remember to leave some room for the Holy Spirit. Free. 21 and up. 10 p.m.-1:45 a.m. Saturday Aug. 4. Northside Tavern. 4163 Hamilton Ave., Northside.