Basically, I just started

but I'm slowly getting there. Today, I was having lunch with my mate, and we were both turning our backs against two nice ladies behind me. So I kinda went for it and tried a really silly opener, inspired by Style, and asked them to think of a number between 1 and 10. Of course, they chose something completely different, at which point I turned my back to talk a bit to my mate, and after 3 minutes(counting

) I turned around, ready to ask them how they know each other etc., but as my first words left the mouth, I realised they are already talking about something else and did not hear me.
So the question is, how long should have I waited, or even, was it right of me to turn my back temporarily? Should I next time just carry on?
cheers
