What if the celebration is... insert any sin. Who is defining the exceptions? What makes this sin business-tolerable, but this sin a non-starter?
The business owner, it's his/her business not the "states".
Back to Troy's point about society ...
Does this business operate completely independently?
Does it provide its own police protection?
Does it provide its own firefighting service?
Does it maintain the roads and bridges leading to its parking lot?
Does it maintain its own legal courts?
Does it maintain a standing army to repel invasions from ISIL?
If it does not partake in any of the institutions (dare I say "benefits"?) of society, then I would agree it does not have to conform to society's regulations concerning justice.