There really weren't that many 60's songs in Rock Band 2 either. The 60's Marathon gig in Moscow consisted of:
Spirit in the Sky
Hardly a marathon.
Also, I think I speak for everyone who contributed when I say "Thanks for picking the song(s) I suggested!"
Unless maybe someone contributed and you didn't pick their songs. I shall speak for them too, just in case: "I'm sorry I didn't pick (a) better song(s)!"