I'm sure they’ll like whatever you do since they know you and they are asking you back to play again. It seems kind of hard to give you a generic song list that will go over well at a wedding. People’s tastes are so varied these days. Why don’t you ask the parents, bride and groom what they would like to hear?
With that said, those group dance (line dancing?) type songs always seem to be popular. Stuff like “The Cupid Shuffle”

I think it’s a great idea to mix up the live playing with the pre-recorded stuff. I’ve never really done that so I’d be interested in hearing other SZ member’s thoughts on how they go about that.

Good luck!