Sexual activity at nudist resorts

On their websites, all nudist resorts forbid "public sexual activity". But as a single, straight, male visitor sometimes I am interested in a little private activity. I find it hard to believe that everyone -- m or f -- is there just to air their differences. So I am naive, but how do I go about determining if that pretty lady by the pool might be interested in some play-time without going to her and asking, "Hey Baby. let's have sex"? Or how do I find out if the attractive couple may actually be looking for someone for a three-some? Once, I parked my travel trailer in a nudist park where I was next to a small RV occupied by an older couple. Before I could get set up, they were out to greet me. We chatted a bit and the lady said, "Pete, If I can do anything for you, please let me know-- and I mean anything." Not being experienced in that area, it did not dawn on me until it was too late that she did mean "ANYTHING". Please tell me your TRUE experiences in this area. Thank-you