Absolutely!! Reschedule with her during the day at a coffee shop....that's what I do sometimes. That way you're not losing social time, but redirecting it to something more manageable. It's okay to avoid temptation...for sure!
Before I decided to get sober, I had planned to go to a winery with my boss...now I'm trying to decide what to say to her. I'll probably cancel altogether for now, then when I'm feeling more strong, meet up with her for lunch and just drink iced tea.