I think many would agree that a ceiling fan just won't work in the LM bedrooms -- not enough ceiling clearance. I like the air circulation but the standard bathroom vent is just too noisy plus the skylight over the shower lets in too much light if we're sleeping late.
We purchased a $15 ten inch fan with variable speeds that serves for both air circulation and white noise. It has a clip-on feature that clips onto the bed slide framing and works great. It also takes up no floor space