We stopped going to casino night...still dress in lingerie, etc. for PatyO's but found for the number of people wanting to play the casino games...
21st to June 1st for us.
Since we didn't do a package this time (just going with FF miles), our room rate is the highest it's ever been (and we're even using a referral...
Here's another good resource to post your question and get replies from a variety of different perspectives: https://www.reddit.com/r/Swingers/