Pretty simple: free booze on Adobe's tab. Likely Shiner beer and some kind of hard liquor.  At the Adobe day stage in the Convention Center.  Free with RSVP (don't forget to bring your printed RSVP tickets).

Another free party paid for by another software company, Appcelerator. Play a round of Street Fighter II or skeeball while downing free imported beer.  Also, "Man Bites Dog" build-your-own-gourmet-hot-dog buffet and free t-shirts. Just walk in, no RSVP required.