It usually is NOT allowed in public cardrooms. It needlessly slows down the game-- pretty soon you will be running every single hand to the river if you start letting people rabbit hunt.
^ this.
I can put up with a lot of stuff when I'm dealing, but being asked to rabbit hunt cards (
especially by players who ought to know better) puts me on mega-tilt. It's usually some douchebag that's spent the past two minutes umming and aahing over whether they're going to call with what was obviously a flush draw getting the wrong
odds too, so they've already held the game up for no good reason.
Some of them even seem to think it's a good way to show they were serious about the hand
For the love of gawd people,
don't be that person. Just muck 'em and move on.