You just can't have too many free food and drink events at these conferences.

Expo Hall Reception
Monday, June 6 6:00pm – 9:00pm Hall A/B

Microsoft Tech·Ed 2005 Attendee Party
Thursday, June 9 7:30pm – 11:00pm Universal Studios Orlando

I am sure some more open events will happen to fill in the gaps for Tuesday and Wednesday.  There are several private parties going on.  If you have not been invited to any then you need to become better friends with the people who hold the invitations.  I will let you figure out how it works on your own.