We noticed that the on longer sailings and where the passengers are from as well as age impact the way they dress. On our Panama Canal Cruise, there was almost a 50-50 split between New Yorkers/Floridians and Californians. The age spread was 30's - 70's and was a spotlight cruise with a Food and Wine theme. The East Coasters were much more dressed than the Californians on the informal and casual nights. Same for Alaska - also about equal. On our Celebrity Carribbean (10 days) and RCCL 12 Day Carribbean (An older crowd) there were few Californians and much more formal all the nights.