The film begins with a cruise ship getting stuck on a reef. The cruise line sends one of its execs (John Payne) to meet the passengers in order to placate them and get each one to sign a release. However, one (Alice Faye) is not so easily satisfied and refuses to sign. After all, she cannot afford to take another trip a couple weeks later and she insists that the cruise line owes her a vacation and NOW! So, to avoid a lawsuit, he arranges for the woman to be flown to Havana to be wined and dined in style. She is happy but won't sign the release until AFTER the trip is over--as it COULD still be a lousy vacation. So, to be sure the vacation is great, he arranges for a local ne'er-do-well (Cesar Romero) to romance her. The problem is that he already has a girlfriend (Carmen Miranda)--and she's one jealous lady! What's next? Well, it's pretty predictable but quite entertaining.
This picture is pretty much what you'd expect from a film from this studio--some very nice Technicolor, a few songs and a lot of fun. While none of "Week-End in Havana" is certainly NOT a great film, it is a decent little time-passer and is worth seeing. It's also one of Miranda's best films, as she's used more effectively than in many of her Fox movies.
By the way, at the 73 minute mark, you can catch a brief glimpse of Hugh Beaumont--but look fast or you'll miss him.