Beautiful beaches, lively casinos and late-night dancing made it the perfect getaway, only an hour's flight from Miami. Cuba is the largest country in the Caribbean, so there's some exciting possibilities," said Roger Frizzell, spokesman for Carnival Corp. He said "some infrastructure for cruising already exists in the country," although other issues "need to be taken into consideration if this market opens up. While most Americans are prohibited from traveling to Cuba and spending money there, close relatives of Cubans, academics and people on accredited cultural education programs can visit. "Once people get a glimpse of Cuba, they always want to see more," said Katharine Bonner, a senior executive at Connecticut-based tour operator Tauck, which runs tours there under a cultural exchange license. The challenge for the industry will be to offer trips to Cuba for eager tourists without alienating anti-Castro Cuban-Americans who stay in hotels or take cruises elsewhere. [...] for now, senior Obama administration officials say that travel to Cuba for tourist activities will remain prohibited. [...] spokesman Anthony Black noted that "having served there through our charter operations, the groundwork has been laid for us to possibly serve the market if an opportunity becomes available." There is one dating back to 1953 — it was last updated on July 30, 1957 — that allows specific routes from New York, Washington D.C., Houston, New Orleans and the Florida cities of Miami, St.