Mine is as well. So far the only way I have found to locate such increasingly-rare rooms is booking.com followed by calling the hotel. For all their sins, Booking at least lets you search for hotels that have bathtubs in any rooms at all.

Aside from rinsing off after a pool or ocean swim, or when she is actually dirty (e.g., after yard work), I think I have known her to voluntarily take three or four showers in 25 years together.