Just this moment, more information on the alleged "CLUB-GYM" was released. It is, in fact, not a tour of some sort, but rather a website, which dedicates itself to bring information to people who would like to know more about B'z, or haven't been able to go to a show because tickets were sold out.
This includes information such as where and how to obtain tickets as well as information on upcoming performances, releases and live tours. The website will provide an e-mail newsletter containing said information.
The start date of the "Club-Gym" website is to be announced soon.
The "Club-Gym" is different from the official fanclub B'z PARTY, which is meant for people who want to support B'z. Perks such as fanclub-exclusive events, ticket lotteries and a chance to meet&greet with the band are exclusive to members of B'z PARTY.