In the middle of the week the crowds are slim in Deadwood.
But you can find the few gamblers who came to win playing with pennies.
"We like to play the penny slots because you got the bonuses and there's more action going on there," said James Reid, who enjoys the Penny Slots.
"There are 40 lines, and you bet a penny on each line so its 40 cents so you have more of a chance to win something, that's why I like them," said Kathy Reid, who enjoys the Penny Slots.
There's hard proof in the popularity of the penny. In 2012 more than 65 percent of Deadwood Casinos' total revenue was gambled on the penny slots.
Last year, gamblers anted up $772,187,407 to the one-cent machines.
"You see everybody playing them. And if you want to bet high you can bet 4-5 dollars on a lot of them. So you can gamble big if you want to," said James Reid.
"They are coming out with some very good machines with entertainment value. Here we've got the mummy machine, the Superman Machine, Victory Quest, Tarzan, all those fit very well in a penny slot machine," said Ken Gienger, General Manager of the Celebrity Hotel, Museum and Gaming.
It used to be a staple in casinos; gamblers enjoying a cigarette while sitting at the slots.
But Gienger said the improvement in the 2012 gaming numbers is proof the slots are bouncing back.
"There's been some ebb and flows. People were concerned about the smoking issue; we still are because our competitors can have smoking in their areas. But we've had to adjust and we've adjusted well here in Deadwood," said Gienger.
Adjusted so well, that Deadwood's revenue is up more than six percent in 2012 compared to 2011.
For avid players, the proof is in the penny.
"I bet like 30 cents and won 300 dollars on one of them. There's always a chance to get something good," said James Reid.
The popularity of the penny isn't lost on the Video Lottery Industry either.
The South Dakota Department of Revenue is pushing a bill that would authorize one cent credit for video lottery machines.
The smallest coin amount currently is five cents.