Being from Hawaii, but born and bred on the East Coast, going to Greenbergs at the NY, NY casino, was a slice of freakin deli Heaven. I stayed next door, one night at the M. Carlo. I'm from the south (Virginia) so I ordered a Pastrami and Swiss on marble Rye with Mayo and deli mustard.
The rest of the week I was staying at the Mirage, (The "Carnegie Deli" at the Mirage, wanted $26 for a P-strami at the Mirage, this was madness.) but I made the trek back to GB's for another, soooooooooo worth it!