Elsewhere was opened last fall by the team who used to run Glasslands Gallery, one of the great music venues from when Williamsburg was still offbeat. As always, their goal has been to foster a supportive environment for emerging artists, which means that this is the place to catch quality artists before they blow up. To accommodate all the time you ought to spend there, the space is plentiful: two stages, a loft cafe, a skybridge art gallery and, starting this weekend, a very large roof.

This weekend’s celebration features rooftop performances from the very rock ’n’ roll NOBUNNY on Friday and the more danceable Branko, a Portuguese D.J. and producer, on Saturday. Both days will feature food pop-ups, Holy Ground BBQ on Friday and Mission Chinese on Saturday, in addition to new art installations by Andrea Wolf and Hisham Akira Bharoocha.

Not on the bill, but guaranteed to be present, will be a slew of pretty interesting audience members; the space attracts people who are generally on the cutting edge of something. Since it’s still early days, you’ll find yourself among the insider crowd.

If you’re in town, you should go — first, because it’s going to be a good time, and second, so you can tell future generations of New Yorkers that you were there when Elsewhere first opened its roof. This is history. (Google Map)