How to set up a multiple camera system?

Let's say I have many different 'views' I want the player to see. I want the player to see their character in a lobby when they die or when they respawn, I want another camera that the player might see when the something exciting is happening in the game while they're in a menu. What do I do? Do I have multiple parts at the locations and insert cameras into them? How would I switch to and fro from these cameras in a fairly simple, efficient way?