Geegee- where in Tokyo are you living at the moment? I currently go to community-based classes in Oomori at the Sanno Hall on Tuesdays from 10am – 12pm and Thursdays 7pm – 9pm. They suit all levels and are run by volunteers. Price ranges from 100 yen per class to 1000 yen per month. Very cheap and it’s a great way to network with other foreigners and the locals :) – hope that helps!