No it's not a staff meeting. I don't know who all of the volunteers were, so as I said I'd need to you who you are, what you did and who you reported to in a Private Message if you think you could make it at that time. I need to double check with the person you helped out, just in case. Once I do that, I can PM you back with details.
All I'm going to say is that it's a fun thing in the evening, and I thought I'd extend the invitation to the "volunteer-volunteers" that pretty much ended up doing as much as staff and the regular volunteers at the con. Unfortunately, I don't have a list to go by or I would have just emailed.