What are they talking about?

M: That’s fine. Thank you. It’s settled. We can pick up the tickets at the box officer tonight.
W: Great!
M: I guess you haven’t ever been to a hockey game.
W: Yes. But I’ve read a few things about it in the papers. What time does it start, David?
M: Six o’clock sharp. But we should get there a little before that if we want to see a warm-up.
W: Warm-up?
M: The players prepare for the game by doing some skating and shooting before it starts to loose up.
W: OK! We’ll have an early dinner and meet inside the front entrance. How about 5:15 ?
M: That’s fine.
W: That’ll let us pick up the tickets, and find our seats to watch the warm-up.