All kinds of good advice here. I think i'm just going to be safe and avoid roms all together. I will probably just stick an LED TV and a PS4 in one cab to run the new street fighter and mortal kombat games. Stick a PC in one and run the pacman collection off steam, and maybe a PS2 in a couple others that have a copy of namco museum or something like that. Then the cases will just be controllers with a TV mounted in them and my bar will have a couple consoles in it people can play games on.
Prepare to be surprised -- you can't do that either, legally. The SCA license for the system software on the PS4 allows only personal, non-commercial use:
"Subject to this Agreement's terms, SCE grants you a non-exclusive, non-commercial right to use System Software solely on your PS4 system. Your rights to use previous versions of System Software other than the current version of System Software terminates as soon as you can receive or have the most current version of System Software installed on your PS4 system."
The patent licenses associated with it are also for non-commercial use.
Most game publishers, if not all, explicitly limit commercial use of their software, as well.
EA's license:
"Through this purchase, you are acquiring and EA grants you a
personal, limited, non-exclusive license to install and use the Software
for your non-commercial use solely as set forth in this License and the
accompanying documentation. Your acquired rights are subject to your
compliance with this Agreement."
Its no different than the license you get when you buy a bluray or music -- you can't legally use it in any commercial setting (free or for money) without buying a *commercial* license.