Surely by now you've gotten the message -- Vegas is not for families anymore. Need further proof? New York-New York, the hotel most like a theme park, is offering up this, yet another Cirque de Soleil (which started, let's remember, as a circus) show, with all the artistic imagery and astonishing human feats we've come to expect, but this one is . . . topless. Occasionally. We think. It won't open until after we go to press, and in typical Vegas fashion, everyone is being cagey about exactly what is going to take place and how much of it will be bare, but the words "provocative," "arousing," "sensuality," "desire," and best of all, "created for adults over 18" are being thrown around. Also, there is some cabaret stool seating, and, even more tellingly, "Love Seats" and "Duo Sofas." You do the math. While you are doing that, we are getting in line, because anything Cirque does is all right by us. We think.