In NY, it's typical to tip 20%, so I just look on the bill there for a service charge and if there is one, I'll just tip the server 10% more.
That’s a very good point. I’m always torn over the amount of gratuity to leave. What do Jamaicans feel is an appropriate percentage? I’m taking about restaurants with the 10% service charge and not the mom and pop/family run restaurants. I will always do 20% for good food and service there.