1 Terry: It was nice meeting you, Bonnie. We’re off back to Australia.
1 Steve: Crikey!
2 Jane Goodall: And I’ll be heading back to Africa in a few weeks.
3 Terry: Not immediately?
4 Jane Goodall: Ehh. The chimps can look after themselves. I’ve got some bars to hit.

Alternate punchline that I considered:

4 Jane Goodall: Ehh. The chimps can look after themselves. Do you know how few bars there are in Gombe National Park?

I thought this might be a little too much work to go through the chain of logic and realise why Jane was interested in staying in England a bit longer. You want to make your audience think a bit, but not scratch their heads.

Unless you're a flea circus.