We were on the SB Quest in Jan/Feb this year. One night a party of 4 came in to the dining room. Three were dressed appropriately - one was in jean shorts, T-shirt and tennis shoes. I had seen them earlier in the cruise where all were dressed as required. I don't know why this one particular night the one gentleman didn't dress appropriately - maybe his stuff didn't come back from the laundry. He should have made the decision to not come to the dining room, or Seabourn should have said, "No". However, he was seated with his companions. Personally, it didn't make my dinner any less enjoyable, but I am a stickler for rules. Don't have em if you ain't gonna follow em.