The Holland America dress code is a collared shirt and slacks for men and a top and slacks or dress for women. No jeans or t-shirts in the dining room or specialty restaurants at dinner. HAL is not enforcing this dress code and some passengers (abut 25-30%) were wearing t-shirts and jeans to the dining room on the California Coastal cruise 11/5-11/12/22. Really, they can't dress up for 7 nights? They have to wear old jeans and t-shirts even on gala nights?! That would be men AND women who dress like they are taking out the trash or cleaning the garage. Very unappealing when your fellow passengers have looked forward to dressing well for dinner so it could be a special occasion with fine dining. I refuse to just give up and say "It is what it is." That is why there are so many slobs who do not even have enough self-respect or respect for their fellow diners to put in some effort and wear a collared shirt or top.