Search the men's lounge, several topics on this...but here's the gist
It doesn't raise attention lol those places get much of their business from hourly customers lol. Don't bring her into the lobby why would you? Usually one or the other party gets the room, typically the girl tbh but either way it's not done together
Go in, hold up two fingers, give him your id (most of them make a copy in case you trash the room), pay the 20-30 for two hours (get extra time in case life happens and people are running late or session runs long), get the key and enjoy