Neither.. I am coming into that phase in life where I wont do either...
It's a WIP for me.
Go on a date with a friend of the opposite gender or with a stranger?

That's a topic for a coffee or something.
Serial cheaters getting married is normal, but that goes to show how communication is not there. Either one of them is not keeping the other happy. Cheating, imo, is when a need(s) isnt meant. Getting a divorce and moving on, that's a whole different thing.
Ever knowingly continued a relationship with someone who was married at that time?