Reply to Morning glory
I did some research about modern, computerized gambling machines. A random number generator is used to provide the outcome for each "pull of the handle." So the old tips about finding a loose slot machine no longer apply.
These days, like state lotteries, there are larger slot machine jackpots. As a result... there are far less smaller payouts.
On this trip, I played older 3 reel mechanical slots, and the newest 1 cent video machines. $20 will last about 5 minutes on each. I only won a few very small payouts.
We used to enjoy playing the old mechanical horse race game. Where many people could play at once. The little horses ran around the track while everyone cheered. But these type games have disappeared.
Casinos now have automated Roulette, blackjack, and craps machines with an animated video "person" running the game. I'm thinking this is the next "wave" of innovation. Powered by Artifical Intelligence software, casinos can employ less human dealers, pit bosses, security guards, etc. Instead of real "chips" there will be virtual chips.
The switch many years ago from coin operated slot machines eliminated thousands of jobs. I'm sure this trend will continue.
Remember to have a gambling budget. Once you lose that... walk away. My budget was $120.