For us it isn't the included drinks. We don't drink during the day as a general rule, excluding maybe a single beer each after a sweaty excursion/outing (replacing essential body fluids). We do enjoy a cocktail in the evening, but don't get overserved. We do the YC for the short lines, service on board and for the generally very accommodating restaurant that isn't the madhouse of a main dining room. I could care less what others wear, but my own standard of what is appropriate dining room dress is applied just to me. I don't judge others. (OK, except for the guy in the wife beater shirt & ball cap - that was over the line).