Mister Roberts (1955)

A group of sailors gather excitedly to spy on a woman showering in another ship (off-screen).

A character tries to invite a nurse to his cabin. He prepares a drink and suggestive pillows in hopes of wooing her. Nothing is shown or actually happens, but a good amount of focus surrounds planning the intended seduction.

At least one man is implied to spend the night with a woman during shore leave, although nothing is shown or made verbally explicit.