On our Silversea Cruise last September (Silver Cloud, Stockholm to London)I had done my research and determined that I would need to buy a tux to fit in (didn't own one). Before this experience, I was mildly "anti formal night and tux" in my preferences. The first thing I found out was that tuxes can be very light in weight, and needn't be that pricey. Then, on the cruise, I found myself actually enjoying the formal nights. The tux had been fitted and was comfortable. Everybody was having a good time, and the atmoshpere was not stuffy at all. Oh well, we are never too old to learn new things, right?

Previous posts are correct in that Silversea's "base" of regular customers do want formal nights to remain. This base also does not like ship's photographers or art auctions. Silversea appears to listen to its base, and thus there are formal nights, but no photographer or auctions.

I'd say that on this cruise about 95% of the men wore tuxes, dinner jackets, or some other clothing more formal than dark suit and tie.