I live at the corner of HighPark and Bloor! (well, Pacific, which is the next street up) -- what a small world.
The closest club is the one already listed, it's about a total of 35-45 min to get there (including wait times, transfers etc.).
You can see the training times at bjj.ca.
The easiest way to get there by public transport is to first take the subway from High Park station to spadina and get the street car to King Street. You'll know you're there because there's a very large backpackers hostel right at the corner. Sometimes the street-car doesn't go all the way down though so ask the driver if he's going as far as king. Even if he turns off it only adds another 2minutes walking to the club.
Once you get off at the corner go right until you get to 571(or 570?) King Street. You'll see a gas station - walk up the alley way and take the entrance marked "Film Green Studios".
If this friend wanted to train with Omar and Steve etc I could give TTC directions to their club. Unfortunately it's about 1.5+ hours by public transport.