John,
After speaking to a couple of magicians, I am finally pulling my finger out and joining my local magic club too. Next Wednesday will be my first night at the Zodiac Magical Society, and it's a lecture evening.
The club has no formal interview, but you do have to be recommended for membership, so you have to go along for a while and get yourself known to the members.
I don't have any stories or advice yet, but as we're both joining clubs at roughly the same time, perhaps we can compare notes?
