This Friday, Ground Zero invites mega-fans and casual readers of Harry Potter alike to come together for drinks and dancing. Grab your wand and put on your house colors. Or dress up as your favorite character from the series, be it a nearly headless ghost, a noseless villain, a fussy owl, or a marauder. The night will feature wizards mingling and toasting to the series with booze, and the dance floor will spin tunes from the ’80s though the ’00s. 21+.