Retractable glass roof

This May, Studio B will expand to a new full floor rooftop level, featuring an extra large bar area and a full sound system. The coolest thing about the new floor -- Studio B has built a retractable glass roof so that you can take a break from the main room, or relax under the stars, all year round, rain or shine, summer or winter.

That's from a press release that was just went about the rooftop and the first show in May. They don't seem too worried.