right now.it cannot be explained without a specific context？Without any context, it is impossible to say. If you wrote this sentence yourself, what situation did you have in mind? Were you trying to describe an action that is taking place right now, or something that is planned for the future?
I would specifically use this if there is a function or some other meeting at the restaurant (or if the restaurant is a meeting point before going soemewhere else) and I and other people are grouping into the restaurant in this same period of time. Some people are alredy in some other are about to enter."We are gathering at the restaurant now. "