There's No Sex Like Snow Sex(1974)

Original title: Beim Jodeln juckt die Lederhose

A load of excited female winter vacationers travel to the Bavarian mountains. It's going to be a turbulent time for the funny little fat director from Berlin and the other passengers. The ladies have planned for this, traveling without husbands - in the hope of finding more than a full replacement among the local lads. And none of them are disappointed, although the innkeeper is keen to ensure that his establishment remains respectable.