Excuse me, can I invite my girlfriend for the night when I stay alone?

Hehe, my friend, it seems that you are still relatively inexperienced in this field.

It's not the sixties and seventies anymore. How many students live in the same room or together? You can register at the reception desk. No one will care. You are a normal couple, no problem. Regular hotels don't stipulate that people are not allowed to stay in the middle of the night.

Take the first step bravely, come on!