If you think you are strong enough you can still go and drink soda/water and interact with co-workers. If you are feeling tempted while there you can have an escape plan- i.e. have dinner plans, have to give someone a ride, have to help a friend. My point is if you go and you don't have to drink. That is a pattern you need to break for long term sobriety.
I agree with the others- if you think you will drink, forget what I said and just do not attend this one.