You could always start your own promotion campaign with bumper stickers that say...

"for a good time..." and then put their contact information

Seriously though, I'm all for private clubs. The letter could have been a bit more congenial it sounds. Water off a ducks back...

Whenever I meet someone like this though, I go out of my way to appear like I have NO IDEA who they are or what they profess to be a part of. I'm willing to make time to give pretentious people a hard time