There's no 'typical' answer to this question. Some will. Some won't. I expect most would send a text or two but otherwise concentrate on enjoying their time with their friends. But I wouldn't think anything of a girlfriend who sent photos, or who was not in contact at all. I assume you're asking this because your girlfriend has been with her friends and hasn't contacted you at all. In which case that's fine. She's focusing on her friends instead of you. Nothing wrong with that when she's on a night out with them.