Details and tickets come from the organiser (gaywelcome.com). Check with them before you go.
Organised by Cruise4Bears.com - the Mediterranean Bear Cruise is a gay group (all bears) on the Liberty of the Seas cruise ship from Royal Caribbean. So you can expect top-notch facilities on this huge ship, great food and friendly staff. The cruise sets off from Barcelona up the coast to the Côte d'Azur in France. Then on to Italy - with stops near Florence and Pisa, and then on to Rome and then Naples. The ship then turns around and heads back to Barcelona.
Barcelona > Palma de Mallorca > Provence (Marseille) > La Spezia (Florence,Pisa) > Civitavecchia (Rome) > Naples > Barcelona