There are also a growing number of gyms which have discarded styles altogether and call themselves 'reality based' or 'combatives' or something like that. These gyms will be geared for pure street - or as pure as one gets in a gym anyway.
It almost goes without saying that the quality of your training will depend more on your instructor than what he calls his style.
You might peruse this forum for information, as well:
http://message.geoffthompson.com/cgi-bin/ultimatebb.cgi