Meet and greets are generally considered to be information occasions. Since it's for a school board candidate however, you still want it to be professional. Try:

(Candiate's Name)
cordially invites you to a
Meet and Greet
Friday January 13, 2006
at 7:30 PM
The Sheraton Ball Room

R.S.V.P. by January 7
to (Host)

If someone else is sponsoring, the wording can go as follows:

(Sponsor's Name)
cordially invites you to
Meet and Greet (Candidate's name)
Friday January 13, 2006
at 7:30 PM
The Sheraton Ball Room

R.S.V.P. by January 7
to (Host)