My company has a 3 day in the office, 2 day WFH policy. They have catered lunches on Monday/Tuesday so those days the office is pretty full but Thursday/Friday it's a ghost town.
My office is 10 minutes from my house so I go in most days but am 100% WFH on Friday afternoons. Really I only go in because I'm more productive and I get stir crazy spending an entire day in my house.