What’s the best library or study space in Tokyo with long working hours?

Hi all,

I plan on enrolling in a month-long intensive teaching program based in Shinjuku. My classes would end at around 6 PM, and since I’ll be living in a sharehouse where peace and quiet might not be guaranteed, I’m looking into some nearby libraries that are open for a few hours after 6, at least until 9ish.

Since I’ll only be there for a month and won’t have a residence card, I won’t be able to borrow books and that isn’t even my intention (maybe just browse them) – I’m more interested in finding a place with good Wi-Fi where I can charge my laptop and go through my coursework in peace before heading home.

I've researched some libraries and found a few that work until 9 or 10, but I'd like to hear your opinions on which ones you like the most for studying purposes.

Thanks in advance!