Only thing you can do is go to some pool halls and meet players. If you go to Snookers in Providence, I think Mike Dechaine had a few for sale you can probably try, and likely many players there play with at least a Predator shaft. Try Ivory Billiards which is in central MA. Billiards Cafe in Ayer gets filled up with league and tournament Mon-Th.
I don't know of any place that has demo cues you can try out.