Some comments
44 Euro to 52 US - last yr we had the same thread about many establishments not using the exact exchange rate, generally in the favour of the place of business
For a few dollars not a biggie to me or if it is, then use a cc.
If a resto wants to do dollars for euro's for cash, that is again a thread we've had - their choice and presumbably part of their business model. I remember in 2008, 1st trip, walking in Marigot, checking out the resto's for lunch, everyone seemed to have a pizza on the sign board. Realized some were priced in euro's, some offering 1:1, then when I thought about it realized some of the 1:1's were actually a higher price!

Two complaints
Kakoa - if they are stamping the bill [and nothing on the menu - re service not included, that is a questionable business practice and if true I would not patronize

Greenhouse - guessing this in P'burg or Simpson Bay? if they are putting 1:1 on their bills that is taking the consumer! - Would like that confirmed - are you sure that was on the bill?

J&B