NCL has a class of solo cabins. Depending on the ship they also have a solo cruisers lounge and a solo traveler activities director. If you want to participate they have a few organized activities and group dinners. They have an actual solo cabin that is really small or will sell a regular cabin as solo. Juts make sure and check the prices. If you travel as a solo and want the solo lounge/perks it needs to be on a solo rate.