On the oosterdam currently and saw some people get turned down entry while others were let in right in front of me in shorts as well in the main dining room Very inconsistent enforcement about pants shirts etc. Jeans were also acceptable on dressy nights. Overall would recommend the main dining over Lido - worlds apart in quality.
Ya that makes sense - I called on Oosterdam upgrade and was quoted at 399 pp verandah to signature suite for a cruise leaving in 17 days. Going to gamble a bit and check back in a week.