Here's a hypothetical sentence to illustrate the question:
Here's how I would translate it:"Come to visit me at my cafe, so that I might serve you tea and treat you as you deserve."
This is the best solution I could come up with, but I'm having a problem with it in that it seems unclear if tractem is hortatory or a part of the prior purpose clause ut...dem. I realize that the two ideas are similar, but I want to make it clear that tractem is a part of the purpose clause, while still being able to include quomodo...mereris. How best to do that?Ad thermopolium meum me visitare veni ut potionem tibi dem et quomodo mereris sic te tractem.