Watch Out to Sea (1997) full movies online.
Synopsis: Care-free Charlie cons his widower brother-in-law Herb into an expenses-paid luxury cruise in search of rich, lonely ladies. The catch is that they are required to be dance hosts! With a tyrannical cruise director, and the luscious Liz and lovely Vivian, our heroes have lots of mis-adventures before they finally return to port.
Director: Martha Coolidge
Writer: Robert Nelson Jacobs
Stars: Jack Lemmon, Walter Matthau, Dyan Cannon
Sources: IMDB, Wikipedia