We were at the Oriental Bangkok about 10 years ago waiting for a group of our daughters college age friends meeting us for lunch. They were dressed nicely no jeans and the girls were in sundresses and sandals. As they tried to enter the lobby they were stopped by the doormen. We got up and met the doorman to let him know they were our guests. The attitude and treatment changed im mediately. One of the boys had a broken sandal and the waiter at lunch had a pair of pool shoes delivered to the table. You can not judge a book by its cover, and hotels certainly have a challenge in trYing to determine who belongs.