I bought the Groupon deal 20 classes for $25. I went to about 10 classes before giving up.
Getting there: located on Dupont, there is enough free parking on the street.
Facilities: the gym is up the stairs in a shady warehouse. At the start of class people skip rope in the hall way on cold concrete because the "gym" itself is a poorly ventilated, sweat-smelling, thin-carpeted, old and cramped room with one boxing ring and some hanging punching bags. I can't get over that I actually went to the disgusting gym as many as 10 times. Some days the stench was so bad that I gagged a bit. Not to mention that the dumb bells are always wet with other people's sweat. And NEVER use the community boxing gloves. It was the most disgusting thing I ever did.
The class itself: while the Groupon advertised boxing classes, it was more of a boot camp class. Tony, the instructor, lazily pulls out a card from a deck and states the number of drills we would do. You can take advantage of the class and push yourself as hard as you want to but the gym members aren't particularly motivated. Some days in the last half hour he would have us punch bags, but wouldn't direct us how to do it properly, so I never learned anything.