PDX area recommendations for a solo gent to celebrate a birthday?

I am M35 and from out of town (will be 36 on my BDay) and will be in Portland on my Bday in like a month, but I'll be celebrating with family and friends in the morning. And I'll have the afternoon/Evening to myself.(a Saturday evening if that makes a difference.)

In Portland I've only ever visited Kit Kat with my wife and liked that club. (maybe I'll start there) ... Yes I said wife. She is cool with me going to clubs, (can't go with me this time) just no FS.

I kind of want to take it easy and see what happens. But the more I think about it assuming I find a girl I like is at least I can touch her a little. I've heard Casa Diablo is wild. But if they are gonna do anything special because I'm alone and it's my birthday I'll totally want to check that out. Recommendations?