Starting in the post-Soviet economic crisis of the 1990s as homey, bed and breakfast-style alternatives to Cuba's generally grim state-run hotels, "casas particulares," or private homes, have expanded into an industry with options ranging from small apartments in central Havana to multi-room beach houses with top-notch food and maid service. The Airbnb move could be the most significant development in terms of putting money in the pockets of entrepreneurs across the island and bolstering them in a stagnant state-run economy — leading goals for the Obama administration in warming relations with Cuba. For the time being, non-U.S.