Go to the Time Warner Center and mill around. When you get inside stop at Whole Foods for a healthy bite then do some shopping upstairs. Have a drink at the Jazz Cafe overlooking central park. Then step over to the Hudson Hotel and have a late lunch or drinks in the restaurant or patio.
If you want to see some of the best looking people looking people in NYC without having to travel more than 2 blocks then the Time Warner Center is the place to go.
