Personally, this DCist will be heading down to Virginia Beach to drink gin and tonics and run the annual Rock ‘N’ Roll Half Marathon (let’s face it, probably while drunk). But if you’re sticking around the city on what’s apparently going to be a gorgeous weekend, here are some tips on how to fill your time. FRIDAY: – Big Boi, half of that whacky group Outkast, storms the stage tonight at Dream. 7 p.m., $20….