Places like tours and cruise ships, I don't know of any internships available. Since crews are limited, they are generally only hiring experienced folk - people who can who can wear several hats at the same time. There is a huge expense in housing and travel that it would not be worth their time to pay it for training purposes.
If you're interested in the concert tour scene, see if you can get on the call list of your local IATSE. Or ask about at some of the concert venues, though the venues themselves probably won't have internships, they can get you in touch with where they get their crews from. I don't want to sound negative, but there's no place on a tour for someone in an internship type position. That's not from a being mean perspective, that's from a 'we have so many bunks available on the bus, they all need to be filled with bodies that have vital crew functions'.
Most show tours only carry department heads with them, and already depend a lot on locals to be their extra bodies. They spend each day training in new people to do the day to day work of the tour, since its impossible to carry all with them all the hands a show needs.
Fashion shows I could see being in a position to accept interns, though I don't have any links to offer for you. Anything that is stationary and doesn't have to deal with travel and housing is going to be your best bet. Try for work with a local IA - that will get you experience in different types of events, and might be a foot in the door for a job on a tour. Try to find an event or decor company - I worked at a decor company as my summer job and it was good experience in creative trouble-shooting. Talk with the local convention center and see if they do internships - that would be a foot into industrials.
-Centaura