To be honest, I have almost zero care what people or small businesses use RetroCopy for, at least in such external or real world settings. I know MAME has all these rules and restrictions but if people want to hook up "illegal" or quasi-legal arcades using RetroCopy I'm not sure how I'm supposed to stop them? Or am I supposed to be mad because other people are making coin(s)
off my work? Well they already are so you just deal with it as part of the world we live in.
If you got permission to use ROMs in such a setting (ie a license to do so) then I'm fairly sure as long as the software you are using also has no restrictions on such use, and you are also complying with whatever other laws then it should be ok. So basically, just check the laws, rules, restrictions of everything you are doing to see if you are ok or not.
So since I can only really answer the RC question, no I wouldn't currently care if RC was used in an arcade or coffee shop, etc. Maybe if WALMART/StarBucks/etc starts whoring it I will care, simply because I don't like large organizations. Small business I don't have a problem with.
Since scripting will be in place sometime over the next few months people who were interested in operating a real arcade using RetroCopy probably could hook up coin counters and whatnot if they were capable of basic programming. RetroCopy only emulates about 100 arcade games at the moment (soon to be about 200 with NeoGeo) so I guess people don't find much use with it for these things at the moment compared to MAME, even though it is a lot more accurate.