Maybe I'm wrong here, but my major issue with Groupon is how you're treated as a customer when you go to the establishment. In my experience, I always get treated worse than a "normal" customer. Either they just care less about you, or it's always like a "what is this? I need to go ask my manager".

That's hard to manage as it's out of your control, but I would love a focus on making people care equally about you (not more, I'm asking to been seen as a normal customer rather than a burden).