/b 10, if you don't want to dress up for dining go to the lido deck to eat and don't bother with the dining room - same food, even get your tray carried and water brought to you. Dining room is meant to be nice and we should dress for it. Lido is such a loose term on a HAL ship. So extremely nice compare to Carnival ships.
Now lets talk about flip flops. I saw some ladies dress very nicely and had nice flip flops. ha, just been home a week now from our Alaska inner passage cruise.