Nothing beats the summer blues like unloading a clip full of paintballs into your new brother-in-law (we know, he had it coming). Make a reservation for your group of six or more, or just show up and walk onto the battlefield ready to paint the town red on one of four tournament fields. And if you've sold your whole arsenal from middle school, reload with one of three rental gun and armor packages.
Boston Paintball Outdoor, 1 Tavern Circle, Sudbury (978-263-1277). Rentals start at $35.