I have been dealt 4 that come to mind (I think there are 5, but I'm not coming up with the last one).
First was on an illegal machine in my bar in Astoria. Playing 1 quarter, don't remember what the pay was but probably no more than 500 coins.
2nd was on a quarter machine at Tropicana in AC - I was staying at the old Playboy/Trump (can't remember what the Donald called it). They had a bunch of nickel and dime VP machines on the 3rd level of the casino and they would comp my room and I would get my fill of VP for minimum risk. On this mid-week trip, he closed the 3rd level for some reason. I told the casino staff that I would use the free room, but I was going to play at the Trop where they had FPJOB for quarters. Worked out very well as I hit the royal about an hour after I sat down.
#3 was on a .50 machine at Borgata. Just as I hit deal, I tapped the screen for luck. When the machine locked up, I thought I had tilted it, until I realized that I was dealt a royal.
My 4th was last Christmas on a bartop machine at Showboat. I was getting killed playing quarters, so I upped my game (double joker) to .50 to see if the cards might be in better mood. Viola, another $2,000.00 royal. I welcomed it even with the W2G. I even have a picture of this one on my phone.
What I am still looking for is a dealt 5 of a kind. Back when Joker Poker was the only decent game in AC, I played hundreds of thousands of hands, hit dozens of 5 of kind jackpots, but was never dealt 5 of a kind.
I have friends who have had it happen a number of times. Now, every trip, I spend some time playing the Spin Joker Poker and Triple Play Joker Poker with the progressive jackpot for 5 aces on all hands. I figure I am "due" to get that dealt 5 of a kind and it might as well be aces.
Ned in NYC