Topic of disscussion

Alright, so i was thinking about this and really couldn't conclude a answer.
So i did go seek help, however the help was not that helpful.

Idealing we date people in the knowledge of potential future marriage.

However the problem i see at the moment is, when we eye someone we don't really know their name? so thats one of the first things you ask. So when u ask for their name, and what HAPPENS by chance, their last name is the same as yours.

Have a good think before you say this is a stupid question. I had a huge think too, however when thinking about this subject we need to consider a few things, firstly, not all last names are popular, some are, some arn't. So the scinario is this, your at a bar, and you know u see someone and they see you, go for a few drinks exchange names, and u find out he/she has the same last name as you. What do you do?

Some say if their last name was the same, u wouldn't be too hastey to get into a serious relationship, some say you'd do a check first to make sure (just in case). However then in conclusion would u potentially let this obstacle get in the way of love?

COMMENTS PLEASE, would like to know your opinions.