Don’t forget to check out DCist’s Arts Agenda and Weekly Music Picks for additional entertainment events, including gallery crawls and gypsy punk band Gogol Bardello Saturday at the Black Cat. FRIDAY: >> Everyone is buzzing about The Music/Kasabian show at the 9:30 Club tonight, but if you miss it, you can head to DC9 afterwards for the official Kasabian afterparty — just show your handstamp from the 9:30 Club and you can get in free…