Coffee Nomad

Generally: No, it is not possible to reheat coffee without getting a cup of stale, oily joe.

There is one possibility however: In a regular household environment, it is possible to leave your coffee unheated shortly after it’s initial brewing, wait for it to cool to an air-conditioned room temperature and then use it to make iced coffee.  I would estimate that you can leave it out for a few hours, chilling slowly down to room temperature (78-85 degrees F).  At the end of that time, you can add ice to it (as well as cream and sugar if you prefer) and have a perfectly acceptable glass of ice coffee to get you through the early afternoon.