It’s somewhat common in oil companies to offer salaried employees a 9/80 schedule. The employee works 80 hours in 9 days and gets every other Friday off. Typically people are split into A and B crews so half the office is in on any given Friday. I enjoyed this scheme for two reasons: 1) every other weekend being three days long is magical and 2) even on your Fridays on, you can usually work meeting-free since half the office is out.