Actually you can also get coffee in the library on the Oosterdam.
as to belittling everyone that simply is not true. Having to be compensated for every small miss is a bit entitled (to use the modern vernacular). Customers should note the response time, it was quick. It did not drag on.
Private groups using public spaces happens on every single sailing, this one just happened to be in a space that HAL specific cruisers particularly love, please remember this was an evening event when the crow’s nest usage is light.