Megadeth has done this in their last tour. They picked about thirty something songs from all their albums and then put them up on the official website. Then they asked the fans to vote which 20 songs they wanted to hear live (this is done for every concert in USA). The 20 songs with the most votes got played. Plus the person whose 20 song selection matched the winning 20 songs won a prize - Roadie of the day!

I'm sure Bon Jovi can do a similar thing. Have 30something songs listed on the official website and have the fans choose.