IOA and Universal had lockers that you could store your bags in for long enough to ride the ride (they don't allow bags of any kind on some of their rides, mostly the coasters).
The lockers work electronically - there is a computerized keypad that gives you a code to use for your locker.
I have to say the last time I did this that the computer assigned me a locker and when I went to that locker, it was already full of someone else's stuff. I could have run off with all their stuff had I been so inclined.
I am not sure I will use them again. I will have to do Universal without bags, or travel with someone who won't ride coasters and can hold my bag.
At WDW I just take the bag on all the rides.