Yeah, they are related to video games, but I'd definitely say keep it separate from arcade games, even thought they are 'technically' arcade games. It's really up to you though whether you wanna add pinball, I think it's sort of on the fine line. When I tell people about my game collecting hobby, I certainly mention them, but that's just a part of the conversation, I wasn't sure how we wanted to do it when we are truly cataloging our collections.
If you decide to add it, I could moderate that category for you, to take some weight off of you, and I'm deeply immersed in the hobby so I've got a bit of knowledge there. I'd also be willing to help with the arcade games if you needed it.
@Matt - By the way, thanks so much for creating this site and community, I was actually in the process of handwriting my collection when I stumbled upon the site, and it's so much nicer and more convenient than a handwritten list. And thanks for using Android!!! Woohoo!
(EDIT)
Just took a look at the Arcade section. What you've got listed there is mainly op systems that have pluggable carts and/or discs, when I was referring more to ALL arcade games, including the ones you already have listed there, example would be a dedicated Donkey Kong cabinet, which obviously only plays Donkey Kong. Then the options would be like: Full Cabinet, PCB board only, etc. which would be the rough equivalent of Disc, manual, other inserts when you do the "Add with Details".
Let me know what you come up with. Thanks again!
-Brett