The easiest way is to go to a large shopping centre and sit at a bench, maybe take a magazine or something so you look as if you are waiting for someone.
Then watch, don't stare, just look around every few minutes and try and see how people inter-relate. How women your age act, dress, talk. How women react to women, see who makes eye contact, see how men tend to occupy space etc.
Maybe move around every now and again