I'm a lifeguard on a very busy beach, I'm in great shape, and not too bad looking, plus being a lifeguard just gives a big bonus. My problem is I have trouble approaching. Most girls are in groups, and I'm not bad at approaching singles, but groups, even 2 or 3 totally freeze me, for some reason. Looking for advice, openers, even lines, which people tell me work. I just want to work on developing my game here where things are on easy mode.

Most common situations are girls sitting in their chairs, talking or whatever, and pairs or small groups walking the length of the beach.

Edit: forgot to mention, Because I'm at work, and work requires me to pay attention to the water, I am trying to number close quickly. Not necessarily a minute or two, but it can't turn into an all day hangout or anything. Goal must be short to medium conversation leading to plans later.