I like this one for the start, cause it oozes the beginning of a coming dark age:
http://www.youtube.com/watch?v=LS7k3...ure=plpp_video
And this one for the end of the session ("rolling the credits" like: "tonights beer was provided by.."):
http://www.youtube.com/watch?v=Q0q1g...ure=plpp_video
Btw: "Gimme shelter" from 1969 is now added to my list of T2k-"Soundtrack"-Music - fits well into the broad spectrum of music for the overall theme... nice choice!