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Someone in Colorado had their bar closed down because of the customers' use of profanity on the premises. The state now owns it. If they don't like your customers there, they will close up the whole shop for just about anything. Profanity was the only thing they could catch the owner and patrons on....at first.
A local coffee shop (I was there nearly every day) also almost got hit with this but the owners agreed to actually having a formal investigation done of their regular customers as to not get their business taken away. I was actually there for that part. People cussed, smoked, and talked politics outside the doors of the place- and were investigated by local law enforcement whilst chatting before or after work at their local hangout.
Colorado has already completely lost it's mind bitch. Fuck Bush.
If they find you doing something illegal on a prime piece of real estate-like cussing in public- the owner might get the place confiscated and given to the state.
It was a couple years back and I'm trying to remember the name of the law they came up with to do all that with- I guess I'll have to get back to it. Here it is, a short article- It was closed down and the owner was investigated and arrested later.

Colorado: State, tavern reach agreement over profanity
Colorado has reached an agreement with a tavern owner who was threatened with the loss of his liquor license for permitting profanity in his establishment. The state will quit threatening tavern owners with that penalty, and the owner of Leonard's Bar II in Colorado Springs will withdraw his civil rights complaint under the plan. Department of Revenue spokeswoman Dorothy Dalquist said July 6 the state decided to stop enforcing the profanity regulation because it is antiquated. A state agent had seized 29 signs, 21 of which included the "f" word, from Leonard Carlo's bar on Aug. 31, citing the now-abandoned 1979 regulation prohibiting profanity in bars. Associated Press