I ask this because I hail from an Asian background where there isn't a tipping culture (we have service tax instead).
I'm told that it's expected to leave a 10% tip. How does this work out if say you've got a $50 meal and only have a $100 note? Do you write down the tip you want to give or just leave a $5 when the waiter brings back the change?
Also, does it also apply to taxis and the bus?
Sorry if I'm overengineering this. I don't want to deny the locals their due =)