Brian and I have moved many times in the past five years, and each time we seem to accumulate more hooks and things that use 3M command strips -- these fabulous strips of sticky material that holds well yet lets go when it is stretched. They have a whole line of these that are water resistant, for both the bath and outdoors.
When we were in Ypsi, we had a shower/tub enclosure that was short on places to hang things, so Brian got some big 3M Command hooks to hang our washcloths on. Moving here, we had a hard time finding the refills that were for the bath and the right size, but it turns out Amazon.com carries them as an add-on, meaning shipping is free if you're ordering something else. I should probably buy more in anticipation of our *next* move. You can recognize them by the blue bath indicator in the upper left-hand corner.
While I was shopping for those, I came across some very fancy looking almost-chrome-looking hooks at Target, and picked them up for hanging our washcloths on in *this* house's shower stall, which is separate from the tub and short on both hanging places and space in general. We used another old one with a simpler hook to hang the back scrubber, and the squeegee I picked up to get the water off the door after showering also came with a Command Strip-fastened holder to put on the wall.
We find that these work very well on tile. Sometimes less well on paint, which can get greasy in hot steamy weather, causing the hooks to fall off if they are loaded down.
The big hooks we still had, we mounted on either side of the shower door on the outside, to hold the robe and (dry) towel of the person in the shower. I am not sure they could hold a wet towel. They hold about 5 lbs according to the packaging, but there are two strips under each hook. In any case there are lots of towel bars over the tub, they just aren't easy to reach, standing in the shower stall. I think these big hooks look pretty snazzy, and they are high enough that I don't run into them though I suppose a really tall person might. Anyway, they are convenient for us, and the ones inside the shower really improve the usability of the space.
Thanks, 3M! Please keep producing the refills for these!