(In order of their establishment in NYC)
I have not taken any classes, or have seen
Chicago City Limits, but I just checked out their site and I'm quite interested. I think you hear less about CCL on these boards than you do about Gotham (aside from El Jefe saying it's awesome). It almost seems that they are doing the sort of revues that Second City first started doing way, way back in the day.
I hear
Gotham can be really, really fun. Starts you up in short form and then moves you into long form, which produces an interesting performance style. It would seem that this form of performance would be great for getting corporate gigs and playing benefits. Plus they were originally founded by the Groundlings (and then left on a door step), which is interesting.
UCB is what? Ten years old? No, it's older than that, slightly older than that. Eh they've been around for a decent amount of time. They solidified the New York long form improv scene, brought some of the best teachers from Chicago to New York (many of whom now teach at other improv training centers) and as one can see they have a lot of people going through their program. Their style has altered slightly throughout the years from what I can tell (now using a pretty set curriculum in teaching the levels), I haven't taken any classes there, I've seen plenty of shows and like some of the performers from the older days and some from these new crazy days. I may take classes there but then again I might not, I don't feel too pressed.
The P.I.T. seems like a great alternative to UCB. The course work is intense and there are many awesome electives taught by random guest instructors that have interested me time and time again. I'm also told, and I get the impression, that the PIT is a great place to go if you wanted to be a writer as they offer classes specifically geared towards writing in the style of several of the more popular New York based comedy television shows. I am also told that they're pretty foot loose and fancy free.
The Magnet Theater, I love it and it is the theater I tend to gravitate towards as they've been pretty good to me. It's relatively small in comparison to a titan such as UCB which isn't a horrible thing as it is easy to make ones presence known in the theater and you can get a lot of stage time if you really want it. The training, in my opinion, deals more with building a connection between the characters on stage than with finding the game of the scene, that said the game of a scene is not ignored, rather it's just one element that adds to the piece as a whole. I've been told the Magnet has a more actorly feel to it, meaning that it looks at improv as a theatrical performance. I'd say that's kind of partly true. I've only heard this from theatery people though. Non-theatrical people who go through the classes have never mentioned this to me. Eh I like them and could say more as I have the most experience with this theater than the others but I'd be turning into a mouthpiece for the theater and that's lame. I will say that they have some sexy house managers though.
The City... do they have classes yet? Do they have a website? Are they even doing those bloody town hall meeting symposium thingies that they said they were going to do? Because I'd like to see one. I'm a nerd though, but then so are many, many, many of you (hence you being on this forum).
Dave Bluvband's Improv School is interesting. It started off with Dave teaching one or two workshops in random areas of the country, totally ignoring the New York improv community. After a year or two of training across the country Bluvband returned to his New York and found a community of improvisers lusting after his beefy improv brain. He now teaches open air classes that have names similar to the levels at UCB. His classes are rain or shine, and in my experience it is almost always raining (though Bluvand normally stays dry under a tent with a heater and hot chocolate machine). He's a hard man, but you'd have to be if you were a one man improv training facility. If you study with him you will go through hell but you will come back as one of the elite improvisers. His classes are quite pricey though, and the intern program sucks ass for while you do get the honor of getting free emails about Bluvband's up coming shows, you do not get free class credit.