Is the fast of one who works in a satellite channel where women and men intermingle acceptable, and what should he do?

It is not permissible to be present in places where men and women mix, especially if the women are provocatively dressed yet semi-naked, which leads to temptation and falling into forbidden acts. One should not work in such places except out of necessity, while searching for another job. Despite this, merely being present in these places does not invalidate the fast.