I'm saying that I sit at the bar, watch them accept lots of $1's and $5's, but when given a $10 they return the change in $J. They definitely could have given change in USD, but don't.

Here's the menu from the Chicken Lavish website so you can see what I mean. This is identical to the menu they were using two weeks ago.

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A Heineken is $200J or $3 US, rum punch is also $200J, but it costs $3.50 US? 3 pcs of chicken $550J and $8 US, pork chops are also $550J but $7.50 US? You can see examples like that all over the menu. Not to mention that rum punch is an exchange rate of 57-1. These menus haven't been reprinted in years. I guess the lesson here is to pay in $J!