I know its not in the Brockton/Bridgewater area, but if you can/want to make the trek out to Somerville. Sityodtong, run by Mark DellaGrotte is incredible. Great Muay Thai. Also plenty of jiu jitsu rolling during open mat sessions. I've only gone to the free classes and the open mat sessions (I go to school out in MN) but it was a great environment and very professional.
Also in Newton, there is Gracie Barra, which is a phenomenal bjj gym and they just redid their mat flooring as well. If you didn't know, Kenny Florian trained at Gracie Barra as well. And Roberto Maia is a awesome teacher. I only took a month of classes from them, but they were very very good. After the first two weeks of classes, I had already started rolling with their advanced guys, which is a really good way of getting good.
Not exactly what you were looking for I know, but those are some great places.