These are all great suggestions - I like the smoking one. I really hated at the resort I was in where - to get to my room I had to go the long way or through the smoking garden area. I like them having their own area - not just stuck in a corner or corralled somewhere.
I like the tables for one - and it'd be sweeter if people didn't think that someone sitting by him or herself is wanting some to 'join them'.
I will say one thing about the all-adult resort I was in in Mexico. It sucked. No kids meant no quiet time. There was always a booze party somewhere, puke in many corners. (Staff was good about constantly cleaning it up but it shows the total disregard some people have.) We got there quite late and the adult pool was still open. As we were going to our room, there was this incredibly drunken chick who ran up to every newcomer and went "Ahhhhhhhhh" (like sticking her tongue out like a doctor makes you do). Drunks shouting from one balcony clear across the pool to the other.
Unless the place was booze-free, I would never again stay in an adult resort. Too much immaturity. Give me the potty talk anyday. (I would say if I were there though, I would start answering the questions too.)