Where to work in Dublin?

I will be in Dublin for a few weeks to do an internship there. It's true that I will be able to work on the laptop or rather relatively mobile.

Does anyone know good places where you can work relatively quiet on the laptop? I do not always need Wi-Fi.

Would be great if you can give me tips:-)

Dublin has a couple of nice parks, are quite crowded (for example with students with laptops) and rain is on the agenda.

Dublin also has public libraries, where you can work and have Wi-Fi.