This is probably the least "Marina-like" of the bars/clubs in the Marina district as the crowd at Gravity slightly more diverse. The bar area is surrounded by booths for sitting (come early) and at the back is a smallish dance floor. The place gets incredibly packed on weekend nights and it gets very, very crowded. So crowded that you can barely move, which apparently is cue for me to leave. On top of this, they've recently started charging a cover! It's only $5, but hey that's one drink. There are so many other places in the city I would rather frequent.