Near M.
Yelp
This is a tough one for me because before the implementation of this spot, the Cliffs L.I.C was my favorite indoor rock climbing spot in all of NYC. However, Brooklyn Boulders Queensbridge has definitely taken that spot. Queensbridge Brooklyn Boulders offers more than just rock climbing. There's some other great amenities that make this spot even that much more rocking (pun intended).
Location: This location is really convenient if you're in Queens, lots of Manhattan and upper Brooklyn (Williamsburg and Greenpoint). If you're in upper Brooklyn and have a bike or don't mind running, then you can access this area easily. Or if you live along the G, you can take the transfer to the 7 and be at Queensborough Plaza in no time. It's really up to you. If you're in Midtown East, West, Upper West Side and Especially Upper East side, or even Harlem; its super easy to get to this spot by train. Overall its only about a 5 minute walk from the Queensborough Plaza train station or about more or less the same from the 21st Queensbridge station off the F.
Staff: Staff has always been really friendly, helpful, accommodating and fun. I ran into one bitch but this was a while ago and I don't even care to remember her. Irrelevant. Other than that, staff is always on point.
Activities: There's great top roping, auto belays (about 4 right now), and obviously, lots of great bouldering. Besides what you'll come here for, there's a cool ping pong table, a really neat area to study and I believe to have private parties. The top floor has a nice, spacious lounge area and the gym in the bottom floor is really good. The gym has plenty of weights, kettle bells, a bouldering wall, plenty of apparatus to train your climbing, box jumps, treadmills, slack line, a studio for whatever classes and for personal use, a suana and many more things. For a gym that's in the rock climbing area, its very good.
Misc: Like most rock climbing places from my experience, it seems as if it draws in attractive people. On average. And this place is no exception. Speaking from a heterosexual man's perspective, the women hear tend to be pretty damn cute on average.
If you can get a groupon here, DO IT. It's so worth it. If you enjoy exercise, climbing, testing your abilities in new and find ways, if you're a seasoned climber, just come on out and have a damn good time.