According to previous posts here we don't shower, we use baby wipes.
I don't know what anyone else does because I've never worked with anyone else but I personally will see between 1 and 4 clients a day, and will either have a stand wash, bath or shower inbetween - soap and water is always involved, and depends how much action we've had. Some sessions are just oral, and chat/kissing(client's own choice) so I hardly need a top to toe scrub after that.
I rarely shower or wash before a client leaves, it's their time but if they're jumping in I might follow them. Sometimes I'm off out to the gym or town next so I wait until I get back, and before next person if I've someone else booked in.