I love going to the pool to look for girls. There are a couple of differences at the pool that you have to take note.
Firstly, make sure your buff workout and if you have good abs your as good as gold, and make sure your not wearing your shirt if you look good. Show off those muscles.
Someone else made a good point with the diving board, what i like to do is go to the highest diving board and see all the girls getting scared, then i offer to jump off with them. Then i take their hand and jump off with them. I ussually end up with their # after this.
Another thing me and my friends like to do is play soccer or another sport at the grass near the pool, by the end of the game all the girls that were sitting around are watching us, whats cool about that is i am better then all my friends at soccer.
I ussually have a whole load of numbers after this.
Of course you could just do a normal approach but in my oppinion there not as effective.
Anyway all you need is a big pair of balls and some nice abs, they work best at the pool. All though i do get by with out the abs, it is a huge advantage to have them.