It often seems to me that the cursed drink is the most important benefit for many. For me it used to be the calming atmosphere but that seems long gone as they are now packed. As for morning booze. If I did that I would sleep through the rest of the day!
I can remember being on the 747 upper deck to Dubai and refusing a fourth glass of bubbly much to the dismay of the crew member, but some would argue that I don't practice enough.