Good call, Nino - it is usually a lot cheaper, too. Or at least you get to spend your money on beer and the pinball is free.
The other thing to note is that the dealers are usually happy for you to play their machines any time you drop in. (At least, the two main ones I know are.)
Still, a list of sited pins could be useful if you are looking to get a feel for a particular title and there is no meet coming up for a while, and no local dealers have one.