In Star Trek, we saw both water showers, as well as sonic showers. Sonic showers were used from TNG onward, if I am correct, but at the same time I must think, did any ships have water showers equipped?
Think about it. In Voyager, Neelix took a water bath. This would suggest that a water shower might be available to those who want it. Anybody agree, or have any information?
We've also seen water used in sinks and Troi's bathtub, so I don't see why not. The use of sonic showers would surely be a convenience or cleanliness issue rather than a problem with resources.