My guest bath has several bottles of bath and shower gel suitable for any gender so my guests can choose, as well as a bottle of suitable for all hair types shampoo. If I were leaving bar soap, it would be a fresh, wrapped bar for them with the fresh guest towels that I leave on the guest bed.
The soap at the sink is in a liquid dispenser, and there are terry hand towels as well as paper guest towels--my guests can choose which they'd rather use.
I have a friend who only has the bath towels that she and her family use and hang up in thier bathroom, no hand towels. So if I use the bathroom, I have to either dry my hands on one of theire used bath towels (YUCK!) or on my clothes. The last tiem I wsa there I was wearing soemthing I didn't want to dry my hand son, so I used toilet paper, which is a pain in the butt because it sticks to your fingers. Ugh!