I found the stuff on msdn blog . These guys celebrated the release of Windows 7 RTM & Windows Server 2008 R2 RTM.
This association had members of the Windows development generalization Department (Well thats what i could figure about it even after Translation by MS Translator)
Here is the Party Images:
; "7splash")
Unusual menu at party mentioning Windows 7 cocktails.
; "7_Sweets")
And desserts.The cake featured Windows 7 RTM birthday (official one) i.e. 22July2009.