Yeah, two times is actually my rule as well.
I know in a previous post, some say not to waste time looking for signals, but I do all of the time.
I.E there is some chick at who I work with.
This chick only talks or says hi to me when spoken to. I have tried and started conversations with her numerous times and all I get is a one word response or nothing.
From my point of view, this chick is not friendly, does not want to be bothered and/or is not attracted to me.
Now when I see this chick, I do not even bother to say hello to her and I act like she is not in the same room.
READ THE SIGNALS GENTLEMAN, SO YOU DON'T HAVE TO WASTE YOUR TIME.