Permission separation: "Have severals clubs" permission has been changed by
Create multiple clubs
Join multiple clubs
The number of clubs created or join, can be limit by permission
Club tags can be display on postbit via an option.
Roster can be locked: If roster is locked, user can't leave club (and join an another club if user can join only one club). This lock can be disable in options (ex: for transfert period...)
Add club list tab in member profile