This Saturday is the official opening night of Understudy and Dekalb Stage, the new speakeasy cocktail bar and performance space at Dekalb Market Hall, which we previewed several weeks back. Celebrate the new addition to the Brooklyn nightlife scene with a dance party by Soul Summit, the popular DJ collective behind the summer series in Fort Greene Park and events at Nowadays and Mister Sunday, from 9pm-2am. Tickets are free with RSVP if you arrive before 11pm, and just $10 after that.