Here in Brazil it's very common to have several showers a day. I, for example, take two. The first is when I wake up, before I go to work, and the second is when I get home from work. I wake up at 6.30am and get home at 8pm.
Taking multiple baths a day can dry out your skin really quickly, you need to take one a day, at most. Even so, the areas that need to be washed daily are your pits, face, feet and groin. You could get away with a "whores bath" (washing just those 4 parts with a soapy rag) most days and a full bath every few days.
The exception being if you sweat a lot or have a dirty job of course.
I agree, and there are studies on the amount of showers we can take. I, for example, work sitting down and with the air conditioning on. The problem is travelling from my home to work. It's impossible not to arrive at work very sweaty. An extremely crowded train/bus or just walking for five minutes is enough to make you sweat a lot.
I second this as a principle, though I have a hard time not showering once per day. It's a complicated balance, between not drying your skin with water and soap and not smelling.
I lived in Brazil for quite some time and, it being a huge country, I behaved differently depending if I was in a tropical or subtropical climate. I would mostly have one shower in the morning, except when it was mad hot and humid, when no matter how lightly you dressed, you'd still be drenched in sweat after a while