Are you talking all chips (including NCV, Roulettes) or just cash value chips?

Here's my guess in no order (Las Vegas only)

Four Queens (we put out a chip for any day of the week)

Palms (if you count the (15) Playboy chips as singles and not as sets, and (21) Roulettes, the Palms is #1 in producing the most chips)

Tropicana by the end of the year and all of the baseball chips, this casino will be producing a bunch. of chips

Opera House and Mahoney's Silver Nugget Another 2 casinos that produce a lot of chips (if you combine both casinos, they would be #1)

Hard Rock They have slacked off of record pace but still have pumped out a lot of chips.