Yes an area is social if you want it to be. we prefer to be by our selves. Water pong would be a hit.
not to busy on an side. main pool can be pretty busy. Have to get your spot on the an side pretty early if you like shade like me. On average id say there is 20 or so couples a day the time we go mid January.
don't know about topless on beach since we spend our days at the an beach.
nightlife at css is good. have the after party tues and friday at the beach which is pretty fun. after 11 or so other nights slows down. Spend my time at the beach bar with a few other couples and we have a good time.
Beer is always in my mini fridge. Pretty sure it is red stripe. Never been charged for it.
Hope this answers some of your questions. We were torn between cti and css our first time. Chose css because the quiet beach and not shutting down because wind and have not looked back since. 3rd trip coming in 1 week.