I find myself in somehow disturbed when visiting some (big) online casinos and there is hundreds and hundreds of slot games.. presented just like that ..
This is not resembling in anyway the slot machines in a (real) casino !
I thinked of what if making an organisation like, for example making rooms for each game, with a limeted number of slots, say 10 for example. every (machine) identified apart, and every one with his own progressing jackpot,
So for example when entering the room you have to choose from the available (machines) to start playing !!
Looks unique have not found it on any online casinos I've been because things are customs on online gaming but your idea will need to be coded or another script to make it happen but for me I don't like the idea because it is not solving anything if only available slots and hundreds are waiting to play, they will just go to other online casinos to play.
This is why they had to install a lot of slot machine. The numbers indicated is how usually the average numbers of players waiting for it to play. So they need to take care all.of he users enabling them to play the game they wanted without quequing in line to play th slot machines.
This is why the set up is by having a number of slot machine in those bigger casino.