I feel like places that have a "show up at 10 and work till its late" are immature and fooling themselves thinking they have gains in productivity.
Properly managing your time is a skill and one that management should help you develop. I shouldn't feel pressured to stay late because everyone else was fooling around all day. It also sets clear expectations of how hard and long you should work. There's no "Oh if I don't stay till 9 tonight will my manager think I'm not working hard?" Everyone is on the same page.
Before I started working there I was one of the people that would stay up all night sometimes to finish something. come in groggy the next day and get nothing done for that day. When in reality if I spent 8.5 hours the first day working on it and 8.5 hours the second day, I would have had full mental clarity when working on the project and the added bonus of mental and physical well-being.