I read everything in this topic, and generally I would agree with the point of view that it's not good idea to bring other people into concierge areas if they are not booked concierge and so on.
But I just want to bring something here, which probably is not so obvious.
I'm planning a Christmas cruise, and we are party of 4 adults (me and my husband, 71 yo lady, and 18 yo girl). I already booked one-bedroom for us. But the sleeping places in 1-bedroom are not that great for 4 adults really. So I priced out booking 2 people in one-bedroom, and 2 people in an oceanview. The price for two rooms is a little higher then booking all four into one-bedroom. So appears to be, that all four of us staying in concierge would pay even less money, then if only 2 of us would stay there. And really we are not adding more people into concierge lounge compared to all of us staying in one-bedroom - if say the concierge stuff would offer us to bring other two people with us - like some people mentioned here.
I think probably that is not rare situation to happen. And that is probably why the concierge stuff uses their judgement, and allows some concierge benefits to be used by family members staying non-concierge. As everything is paid off by this family anyways - one way or the other?
Technically one-bedroom can fit 5 people. So when the concierge room is not booked to a full capacity, it allows more space in concierge lounge and other areas. And the amount of money our family would pay for example - would not be any smaller then other party of 4 adults staying in one-bedroom pays. We would certainly have more comfortable beds for our party - with two rooms. But it doesn't really take anything away from other people.
I'm going to disagree with your premise and I will explain why. Your example is that your paying more for a suite plus an ocean view than you would if you just put everyone in the suite. Disney is making more money from this. Is that correct?
In fact, if you all booked into the suite and paid less DCL would be able to still book the ocean view cabin to others and they would make the money from your suite and the money from the ocean view as well so they would be much farther ahead. You are not doing them any favors because you paid more.
As to your comments about your not drinking soda so your daughter drinking yours, well, if you were on RCL and had a drink package sharing is not allowed. Why would this be different?
Personally, I don't have an interest in this and I could not care less if you did what your suggesting. If the concerige allows it then it is not for me or others to question IMO. I just want to show how I feel your thoughts are off a bit.
Just go have a happy cruise and enjoy! I will take it the 71 year old lady may be someones mother and these trips are special. Again, enjoy.
