For women that window is a lot smaller though. Men at least can still look good into their 50's with a sound diet and workout plan, but women, fuck they hit the wall and hit it hard.
Ultimately in your 30's sex comes in a couple ways. Paying for it, which is great, once you find the right whores you can schedule a quick fuck in between whatever you are doing. If you set it up right you get a massage and a nice fuck.
You can meet them out but mostly in clubs you are just trolling for the uber drunk whores that won't remember a thing the next day. Anything else and you have to deal with attitudes.
Married women, lots of stay at home moms who crave some cock during the day.
Finally, online sites, but this takes time and a LOT of trial and error.
Other than that, meeting a chick at a grocery store, library, church, wherever inevitably means she wants a relationship and that is just time I don't have