Avalon Waterways offers themed and specialty river cruises all over the world. Some of their themes are President's, Christmastime, winter, wine, music, as well as some more specialized river...
I work for Avalon Waterways and we offer river cruises starting and ending in Paris. If you go to http://www.avalonwaterways.com/Cruise-Vacations/Seine-River/ you will see the various river cruises...