Another option for those with Friday off: It’s the Midtown Liberty Bar Tour. Twelve downtown-DC bars participate in this crawl that will (a) get you loads of beer at a discount (beer and rail specials for $2 and $3) and (b) let you donate to a local charity (the Manna Food Center). The tour starts at 5; register at Mackey’s for $10 with two cans of food, $13 without. Specials go until midnight.