Excuse me, I need a female's opinion on something so I can settle an argument with my mates over there, do you have a minute?
Pretty much foolproof, few ladies don't like giving an opinion and arguing...
I'd wear a bracelet (it was a very masculine bracelet lol), my question would be something like - my mates think this bangle is feminine, do you think blokes should wear a bangle like this?
Then if she decides to play along, she gets to correct you on the terminology, bracelet not bangle, gives you her opinion, you thank her ask if you can buy her a drink for her troubles which gives you a few more minutes of chat to break the ice some more and win her over.