There's always the Universal Fan Club; it's coordinated through employers and offers nice perks at the Universal parks.
Free soft drinks is a VERY popular perk at the places where I've seen it done. It's cheap when done with fountain machines, as the syrup is really quite inexpensive. There is a bit of an initial expense for the fountain equipment, and a bit of labor for an employee to be responsible for keeping them filled, but depending on your size, you might not need too many. People really love this one.
If you can't do free soft drinks, consider just getting a big ice machine for employee use -- I *really* miss this little bennie. My old employer had them in the kitchens, but my new one does not, and I like to be able to get ice whenever I want it for drinks. (I've been taking ice to work in a small lunch cooler for over a year now, because my current place of work has none available before lunchtime -- we have a snack bar that sells fountain drinks.)
A place where I used to work let us borrow a 15 passenger cargo van at no expense after hours when we needed to move something. There were quite a few rules, though, in addition to keeping it gassed-up. You had to submit your driving record in advance for insurance approval, you could not take the truck more than 50 miles from the plant, and the total mileage per trip was also restricted. Still, it was VERY handy when you needed to move a piece of furniture.