I spent some time in casino's and I agree coins are virtually a thing of the past. The half dollars on black jack are to pay out blackjack on odd abouts like $15 and in that instance they are very often thrown back to the dealer as a tip so they dont need so many of them really.
Here in the UK it is barely worth roll searching (because there is no silver and very few interesting coins to look for...though I need to search 50p peices for a 2008 britania reverse that I still havent found in my change, if you have one feel free to send it to me :P) but we have fruit machines in pubs and also betting shops have roulette and black jack machines which take coins but payout a ticket (which can be exchanged for cash) you can load up the betting machines and hardly play them and then take the ticket to the desk and hey presto...lat time I did that I doubled my investment (way better than a coinstar!)