Followed a handful of the links and there were quite a few inconistencies.

Keeping a listing site up to date is a hard and thankless job, people only notice the mistakes and take the correct information for granted. Not helped by club and session organisers who seem determined to make sure that nobody knows when the club moves or closes even if asked to confirm that details are up to date.

Worse still are the user updated sites where people will put in their details and then just forget about them.

If it was my site I would cut back the coverage geographically to one small enough to be able to keep in touch with all the organisers.