Hello SentinelCraft, RobertoDerito here. I have a thought of 2 ideas or ways as you please to add to the server, i personally think they are pretty simple setups:
ROULETTE
A person is on a fence post, there are 4 dispensers around him/her: one to the left, one to the right, one ahead, and one behind. Each dispenser is marked with different coloured wool (I used Blue, Greed, Red, and Yellow), but only one dispense has an arrow in it (and the arrow will have to change dispensers each time manually). The player will say the colour of wool to identify which dispenser he or she wants to be set off, if the player is lucky they will set off 3/4 dispensers will still be on the fence post, ultimately winning the game. But if the player sets off the wrong dispenser, they will be shot off of the post. (You could also make this apart of the casino, where the player has to pay a fee, and if they win they get prize money).
ANOTHER VERSION OF ROULETTE (But this version is ONLY for the casino).
Basically the same setup as my previous idea, but the only difference is that there is one dispenser. Fill the dispenser with 9 items (one of each), but make sure you have an item that is the "unlucky item" (which will make their game come to an end). A dispenser will drop items in random order, making it a total chance game. The player will have to pay a certain amount for each item that gets dispensed, what ever gets dispensed the player gets to keep. However there is a catch, if the "unlucky item" gets dispensed, the player's game will end, but he or she still gets to keep the items they got that game.
Note: This probably sounds confusing as hell, but i will make demonstrations of both ideas either in my town or on /flat, and will be happy to show it to anyone.
Thank You for your time