Seacrest Out ... with the Mayor?!

L.A. Mayor Antonio Villaraigosa and his GF, hot newscaster Lu Parker, had an unlikely dinner date this weekend -- Ryan Seacrest.

Mayor & Ryan Seacrest: Click to watch
The city needs $1.4 million to cover costs for Michael Jackson's memorial ... and Seacrest just signed a $45 million contract. Wonder what they talked about ...