1 Lambert: Uncle Hillbert’s hotel gained a reputation for being able to house large numbers of guests.
1 Alvissa: Understandably.
2 Lambert: One day, an infinite number of trade caravans arrived from an exotic tropical land, each with an infinite number of merchants.
3 Lambert: But he shuffled around the guests already in the rooms and managed to fit them all in.
4 Alvissa: Wait. Where were all the cart beasts housed?
4 Lambert: Ah, you’ve spotted the aleph-N in the room.

How Uncle Hillbert managed to fit all the merchants in is explained in the annotation for comic #4337.

It's worth pointing out that the merchants are countably infinite. So they're completely trustworthy, because in any negotiation you can definitely count on them.