I've been seriously addicted to a few of the old arcade games in the past
When I had my snooker club, we used to do a good trade with a couple of high-jackpot fruit machines (slots) for the adults, and video games and pintables for everyone.
To increase the profitability further, we stopped renting them after a while and started buying them (second-hand) from a firm down in Bristol that reconditioned them. The only benefit we lost by doing this was that we had to learn how to fix them ourselves, although we did manage to... ahem..... 'secure the services' of one of the engineers who worked for the company we'd previously rented from for a small appearance fee!
Another bonus of this way of working was that we got our own operators licence and were able to rent out gaming and amusement machines to others, always being careful to undercut the local competition. Plus, once the machines had run their course, we used to sell them back to the reconditioning firm.
Pintables always did well, as did the fruit machines, but I remember a couple of arcade games in particular that were real gold mines for a while.
First was the multi-cartridge PlayChoice-10. We bought one pre-loaded with Super Mario Bros 1 2 & 3, Dr Mario, Track & Field, Golf, Bowling, Tennis plus a couple of shoot-em-ups as I recall. The beauty of the PlayChoice was that you didn't buy credits by adding coins, you bought time.
Our friendly engineer even managed to 'borrow' new cartridges for us every now and then
The other game we did well with was the original four player Gauntlet. The concept here was even better in that cash was exchanged for 'life force'; when this ran out, your game was over. With four separate coin-slots, one for each player, and with levels allowing players to attack each other (in addition to the game's antagonists), this was a real winner for a while.