I wouldn't want to meet my T's outside of practice. I used to think I wanted to. But after seeing a past T (a very good one) at the shops last year, I hadn't seen her for 6 years, I actually felt awkward because of all the stuff she knew about me and I didn't know about her.
So I'm happy to keep my T in his office and keep it as a safe place to dump all my drama. Doesn't stop me from fantasizing (who wouldn't want to be married to the person who has treated you the best?) but I know it's just a fantasy.