That group looks like a good find at selly oak for sure, will have to drop in.
@Terry you might end up having to start one, you will need to locate a meeting place that is suitable as a first start.
I am south of Birmingham in Alvechurch
it is looking likely i will have to start a meet up in the loacl area.
I know of a linux group that meets (used to, might still do) the first Tuesday in the month, but they were not very active as a group and would not really be a good place to host a jam (they meet in pubs...
Malvern is a little far to go i know - good 50 minutes from here.
As with all things, need to scratch an itch best to do yourself.
as you say get along to the other jam's first and see what goes on to give you some idea