Valley Speedway uses this mobile app, Fans can get race line ups sent to their phone they are set and results are sent after the race finishes up. Full results of the nights action is sent to the web page after the races.

http://speednetdirect.com/mobile/

He also has an old school bus and at intermission loads the bus with kids from the stands and gives them rides around the track with the windows down, you should see them laughing and screaming and waving to the stands.
He hits all the car shows, fairs, the tracks sponsors businesses, and malls and has pretty good luck in getting local racers to bring out cars. One racer has a 2 seat Modified and the promoter just bought a 2 seat sprinter to take to the promotions as well as give ride a longs.
Early this year he worked out a promotion with the local hockey team and several local racers drove out on the ice with motors in full song and the crowd loved it.