Awesome Job on 24 days RUL,
I have done many of these events in my sober time. I get anxious when it's with a new group. My fail safe plan is hit a meeting earlier the day (I use AA as my program), get a good run in, then meditate before arriving fashionably late. I try to time my entrance to the end of the meet and greet happy hour. So, the drinkers are tuned up already and they have gravitated to one another. This lets me mingle with the non or minute drinkers. Usually a couple hours into the event, I am ready to slide out. If there are a few persistent drink buyers, then I will get a soda water with lime and not drink it. So I always have a drink in hand full.
Sounds like you'll be fine but don't let the case of F its sneak in on you. Good luck RUL.