How much do you tip a free walking tour guide?

Related questions

1. Where is it rude to tip?
2. How much do people tip in Europe?
3. Do you tip in Belgrade?
4. Should you tip in Belgium?
5. Do you tip airport shuttle drivers?
6. Is tipping customary in Europe?
7. Is there Uber in Luxembourg?
8. How much do you tip an all day tour guide?

Tags

1. #based
2. #tours
3. #guide
4. #adjust
5. #always
6. #length
7. #amount
8. #party
9. #these
10. #baseline
11. #types
12. #people
13. #knowledgeable
14. #walking
15. #number
16. #person