If you are like most Seattlites who wait until the last minute to decide which party to hit up tonight, here's your best bests for getting your green on this 4/20 holiday: 1) HempFest 420Fest Music, food, & entertainment from the folks at Hempfest Free to Members, Memberships start at $15 Culture Yard-120 N 35th Street, Seattle. WA 98103 3pm-10pm 2) Do you know Mary Jane Street Party Mary Jane Kirkland is throwing a street party with DJ Jerry Wang, food trucks, and specials a