[Nice. My Ipad hates blogger and just ate my post. I'll sum it below to give context to the comments.]
First, read this tired crap about using DCs as role-play resolution in 5e.
Then remind yourself how tavern role-play should happen and the originality, creativity, and fun that emerges from these situations. Why kill it?
People play role-playing games for that reason - to role-play.
If all I wanted to do was roll dice I'd play a board-game (or a WotC version of D&D).