When I asked the person who invited me to GS After Hours to explain the event, he couldn't really put the idea into words that I could understand. But then I read the FAQs:

"Attendance at GameSpot After Hours headquarters in San Francisco is by invitation only to a select number of GameSpot's Bay Area-based members."

That's when I realized that it's like G.A.M.E but by invite only, which makes me better than you!