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I don't think it'd be inappropriate at all to call the cops and tell them that you are being robbed - because that's exactly what's going on.
Call them - tell them that you are getting robbed by the manager of the bar and that you need a cop to come by and deal with him or arrest him for stealing your money. The minute you fulfilled your end of the deal and completed your show the money in his til that was owed to you became yours. Just because he hasn't handed it to you doesn't mean it's still his.
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All the cops would do is say Sorry, but its a matter for the courts.
But bar owners just dont like cops coming to the bar for a lot of reasons, so it might still be a good idea.


