Would you wear your uniform on a cruise?

One of my bigger mistakes. On our first ever cruise, there was a scheduled Tux night. Ever being cheap, vowing never to buy one, I packed my dinner dress sans cover and gloves. It worked for about 20 paces as people were stopping me and asking questions about the ship. My wife wanted a photo op with the ship's Skipper. OK. Told him I got stopped about 10 times and he just lamented "welcome to my world". Good laugh. Copious alcohol soothed the pain as the evening went on. It did score us an invite to the Skipper's table for dinner later in the cruise. Got interesting as the JO's aboard started a discussion on which Captain was funnier. I won mostly because they heard their Skipper's jokes before. Thank you cards were later sent with the one coming my way thanking me for taking the heat off him for one night. Good times.

I wore my uniform on a cruise ship - the Cunard Princess, tied to the dock in Bahrain. It was an R&R spot for DESERT SHIELD and DESERT STORM and I didn't have any civvies, because it was a deployment. But, I digress...
No, do not wear your uniform

Most cruises have a formal night. I wore mine for that night and that night alone. There was a second night it would have been more or less appropriate. I stayed in that night.

Ultimately, there is nothing *wrong* with it. But it did make me a bit of a spectacle, as CAPT Kevin B. mentions. Up to you if you want to be a spectacle.