WCS, TAF, and some have cited Jurassic Park as great cross-appeal pins. Kids often like dinosaurs so they like it when the t-rex eats the ball.

The one thing that has got more kids playing pinball at Playland not at the Beach (where they have all eras of pins) is the inclusion of ticket prizes. Kids can earn tickets if you make certain score goals (novice, skilled, expert, GC). The kids can then redeem the tickets for prizes later, similar to an arcade. The kids figure out the games that pay the most tickets or which they're good at, so that's resulted in a big increase in EM and short-flipper play because some of them pay out relatively easy compared to the rest. I've even had repeat customers go back to certain games on later visits because they know they pay out well, so the idea appears to be catching on. It's also become a great way to drive interest toward less popular games by shifting the payout mix and/or hinting to kids "psst... want to earn some easy tickets? Go play Bride of Pinbot."

I guess the point is, at Playland, the pins alone aren't usually enough to create appeal to non-pin players. If you want to add some cross appeal to your game room, adding another pin may not be the way to go. Maybe a DDR pad, Guitar Hero, a home theater, Jukebox, nice decor, etc. could be the key. You could assemble a nice home theater and 20 movie library for the same cost of a decent pin (2k-ish). Likewise, if any of that other stuff gets trashed by kids, you won't feel nearly as bad as when they're beating on your pin.