Does everyone here have a large collection of wooden nickels?
Why not just use quarters? 
Not very many real arcades around or reason to have a handful of quarters around to use. It would be nice to be able to use any change and use it as a piggy bank.
Back in '07, when my brain thought the house I just bought was much bigger than it really was, I was going to be building my arcade cab with a fully functional coin door. I went on E-Bay and got a REALLY beat up one with the coin-mechs in there for only $20. Just had to replace some parts in the mechs that had rusted beyond repair, and get a new counter as the one that was on there was messed up. After a few days of hammering and pounding the dents out of the door, then stripping the paint and rusted areas off with steel wool, I was finally able to prime the thing and paint it black. (Used Rustoleum Hammered Black pain to maintain a nice texture on the thing). Home Depot provided me with the locks I needed for the door, and after completely disassembling the mechs, cleaning all the parts, and replacing the ones that had to be replaced, it was working like brand new. I think I spent a total of around $50 or $60 on the door and all the parts needed to replace what was broken, but it looks like it's brand new.
It was around this point that I realized there would be no way at all for me to build an arcade cabinet and have it actually fit inside my house.

So the fully restored coin door has been sitting in my home office upstairs and acting as a really sweet piggy bank. Any time I've gotten a quarter in change, it has gone into the coin door. Something just puts a smile on my face when I put the quarter in the slot, hear it clink through the mech, then drop into the bucket underneath and plop onto the other quarters. A while back, I decided to see how much money I had collected in there. After dumping out all the quarters and counting them up and putting them in rolls, I had over $100 in quarters! This is definitely a cool thing to have as a piggy bank in your cab. You can put a switch behind the reject button so that if you want you can insert a coin for credits, or push the reject button to get a credit. Or, just leave the key to the door in the lock and let people dig in to grab quarters for use if needed.
I'm still keeping my restored coin door to use as an awesome piggy bank, and just in case I decide to build a cocktail cabinet as that is something I could probably put together and build inside the house here and not have to worry about finding a place for it to fit.