Fanmail.biz

I have a question, how do we know if a venue passes fanmail on to someone and they don't have an official site with an email. I know there's a website that lists a couple venues and if they're good/bad for fanmail, but I can't seem to find it.

I'm trying to find out if the Fox Theatre in Detroit passes on fanmail. Thanks!

what i would do (and I'm going to do this), I'm going to call the places to see if they pass on fan mail!! Let me know if this helps!!