I'd personally LOVE to have a close male friend take me to a strip club for my birthday. I would not like a bf to take me though. He can go as much as he wants, it doesn't matter to me, but I would not want to be there with him (ha! I am talking about "him" like he is real!!! )
Friends with benefits keep you from being the very best friends possible. I think it holds you back from that little bit that makes it a real, true friendship that will stand through the tests of time.
Is it the type of friend that you'd like to be more than a friend (relationship type..not just w/benefits)?
Skip the club then. Do something sweet and romantic. Take her out to dinner (something outside if you can), then something that's fun, and then turn sides and take a walk through a big park, beach, or something. And take a rose, girls love roses.
If not, do what she thinks is fun. It's her night out, let her emberass you as much as she wants
I'd take her out for a nice dinner at a fine restaurant, after all she won't be turning 18 again. After that, take her out to a nightclub or a nice bar (no biker bar or a smutty bar).