Now, on to considering a relationship with the dad you were talking to.....
Well.....there are a couple of problems here
1) He lives in another city, he was only here to visit his daughter. And although I picked up enough about him to track him down, that would be very stalker-ish of me, considering 2) The interest was all one-sided. He didn't show any sign that he had a thought of me past the end of the evening. No flirting, no touching, no casual inquiry into my marital status (I don't wear a ring). No asking where I work or indicating in any way that I was of any interest past dinner. I was just a way to pass the time in a room full of people he didn't know. And that's OK because 3) The significance of it was just to open my eyes that I can entertain the thought of moving on. And despite my dismayed post the other day, there are at least a few guys out there that I would consider. That's enough for now.