Tips for you:1) It's a seller's market - you're the buyer I'm afraid.2) People are just choosy and rightly so. If you're prepared to meet up with a couple 'just like that' then it would appear you're not so fussy. And you're expecting THEM to be clean? 3) You could be a total lunatic. The only people who'll respond are also lunatics.4) These things take time, and in all honesty, you'd be better off at a swingers club or similar to get to know likeminded people in real life. 5) This is the net - 90% of what's here isn't real, or certainly not quite as it seems. Since you seem to already know this, you should have figured out points 1-5 already, but you're still asking for tips! Go back to step 1.
The most sense I've heard spoken on this site to date!
I've direct experience of attending a swingers site (albeit 20 years ago), at the time, as a reasonable looking early 30s guy I had great fun with middle aged couples (and sometimes younger!) where the female wanted sex with younger guys and their partner wanted to watch (and sometimes join in).
98% of stuff on this, and similar sites, is just fantasy I'm afraid. It doesn't make it any less valid as entertainment, you're just best off understanding that and managing your expectations accordingly!