You could have a main database, where you will find common tables, such as user for example.
In it you will have the information of which database is used by that user.
Consequently, you would need to have two DAL structures to support this action.
But ....
From what I understand all clubs have their own database but all bases are in one place, right?
If so, I would consider unifying the bases, leaving a single database and putting the information in the records stating which club that record is.
This would make it easier, for example, to have consolidated information from several clubs of the same owner, for example.