As long as it's not as bad as some guy yesterday who forcibly grabbed me and tried to drag me over to his mate going "You know him, yes? You want to? You want to get to know him?? Come over here!" at the station, or some 26yr old who apparently told my 14yr old sister he loved her, took her number, got really threatening when she deleted it from his phone, and then started saying how he'd find her in Reading, kidnap her and take her to Africa where there "are no age limits", reducing her to tears after half an hour or so of this, then I think you'll be fine!! Lol!
Just try start a conversation, which could be casual or continued, so if they don't engage with you then it's not embarrassing..
Eg: er..I dunno..Im only good at "what not to do" as I have loads of those examples! Lol