Remember you want to draw students who might not normally attend. Have a student dress up as a turkey during lunch to promote the meeting. Have the turkey emcee the meeting that night or just be a cheerleader for the teams. Ask several community businesses for door prizes. Restaurants, movie theaters, bowling alleys, etc. are usually open to donating door prizes because it gives them publicity.
Most businesses only require a letter describing the event.
Atmosphere is crucial to a successful meeting.