Tomorrow will be day 5, and my birthday...

I’m feeling really good, thinking much more clearly, waking up more refreshed, and liking it. Going out tomorrow evening for dinner and a play with our wine aficionado friends. I keep going back and forth, maybe have one glass, no just get club soda... but I really don’t think I want the wine. I want to succeed at this. I feel like I need to decide before I go and plan what to drink and what to say about not drinking wine with them. It’s what we do together. Advice?