Hello ladies, I've never understood the tipping rule. We always tip in a restaurant at least 10%. My haircut is usually around 16 pounds and I round it up to 20. I've been to a spa recently and spent 90 pounds. And I didnt tip because 90 is a lot of money already and I was sure the lady who massaged me got a big chunk of that? She looked rather upset when I left without tipping. The treatment was ok but it was half an hour shorter than advertised. What's the rule for hairdresser, spa, etc?