I don't flirt I just have a very outgoing personality. Some people think I am flirting but I am just being me with no expectations. When a person flirts they expect a response.
My best flirt that actually worked every time was in a crowded clubs or bars with everybody dancing and hitting on each other. My buddy and I just sat at the bar and drank beer and talked with each other, uninterested in anyone but our conversation. After an hour or so 2 young ladies wanted to join us and yes it lasted until breakfast the next morning.