How late have you stayed up playing video games? In my earlier days I could stay up all night with friends playing video games. Not so much anymore! I like my sleep.
I can stay up till around 1 or 2am especially on my days off to play video games. I should really stop doing that someday.
I can still stay up all night if I wanted to. I do that every now and then especially on my weekend and then I just sleep the next day to recover.