I'd make it a solid 4.5 hours of bullshitting with people and using the amenities.
Get my gym time in, go for a walk around the building to be seen. Learn the names of the cleaning staff, ask people if they are "makin' copies", if they are let them know it is "very nice". Can't believe the sportsgame.
Soon enough you'll be promoted and you can use that promotion to go to a competitor and negotiate your previous role, but instead remote.