I have played private Texas Hold'em tournaments where you play until one person wins and I have also played online where you can leave when you want games. I will be going to Las Vegas for the first time in a couple months and was wondering how Texas Hold'em games work in Las Vegas?

Do you have to play out or a minimum number of hands or can you leave a table (up or down) at any time?

I assume there are probably different types of games available but what do I need to know to find the right game?

Is there any additional etiquette I need to know regarding leaving a table (aside from not acting like a jerk)?

Thanks in advance for answering a newbie question!