I can tell you 3 things I overheard on our last cruise which I thought were out of line ...
1) Asking for 2 bottles of wine to be delivered to the room. The bartender in the lounge asked, "2 glasses?" No. 2 bottles. Free. Delivered to the room as an extension of happy hour in the lounge.
2) Asking for 12 bottles of beer to be delivered to the room (separate person). When the bartender hesitated for a moment, she followed up with "I've already been told NO twice today. I don't want to hear it again."
3) Asking for smoothies for the kids 5 minutes before the lounge was going to close (after happy hour was over) when the bartender wasn't around.
I have no idea if the requests were accommodated, but I wouldn't blame the concierge team if they weren't.
I was a little annoyed by these things because we are not ones to abuse happy hour, and I hope the "entitlement" attitude by some doesn't ruin happy hour for everyone.
I know that wasn't your question ....
We are pretty simple peeps. We ask for a table to ourselves at dinner, and the concierge has always been able to confirm that. That is the extent of our requests.