hmmm... I was hitting on a lifeguard friday night myself actually... but at a party - much easier!
Well, great job getting the guts to go after her Wookie. I'd kinda leave it at that... if you can, try to keep talking to her without seeming like a wuss (and therefore getting trapped in the friend zone) you'll have a cool friend hot friend and for a minimal time investment she might be free down the line. Worth keeping up the chatter IMO, could be only a matter of weeks till she "casually" mentions she's single ...
BTW, Icarus - what are the ladies like in Sydney? I've loving Brisbane - I never thought my "Canadian accent" would come in so handy