Per my recent post on the subject, I got an e-mail asking about this club, which meets on Thursdays in the Kyobashi Civic Hall.
Since I am not part of it, I can’t say one way or another about quality. However, you should know that there is also another such club, EC88, which meets Friday in the same place (Kyobashi Civic Hall). As the name implies, the club has met since 1988, so 21 years now.
One thing I do know is that the Friday club has a choice of structured learning and “free chat”. There are paid foreigners there, so you are assured to meet them.
If these sort of 500 yen-a-visit clubs are to your liking, you should try out many and see which ones you like.