Can you heat something at alcohol bath?
It would be extremely dangerous to use a flammable solvent for a heat bath because any spill on the hot plate (or even worse, a Bunsen burner) could cause a fire.

If you want to distill off ether, it is by far better to just use warm water from a tap or a kettle, and replace your hot bath regularly.

Trust me, ether can spontaneously catch fire VERY easily ! I have been there!