Do I Have to Choose Between Dinner or Dinner?

This week is my one year work anniversary. My supervisor emaled me saying that she would like to take me out to dinner or coffee to celebrate and say thanks. But i don't know where or what would be appropriate to choose. Would it be weird to pick, like, my favorite sit down restaurant and force my supervisor to share an hour long meal with me? Or do i just pick a coffee shop and save the company some money? I agree that you don't say coffee or dinner. You say one of those two things. Bicle, but i think the solution to the problem is that meg needs to be like, i'd love to have dinner on this day at this time