Not sure what to do. Going to Toni and Guy for my first haircut in over two years tomorrow, it's going to cost £50 as it's with a style director stylist. Do I also then leave a tip? I'm inclined to say no as £50 is a lot for me for a haircut (but no one can cut my hair as good as her so going elsewhere is pointless) and I assume being a style director for Toni and Guy she'll already be on a decent salary so not absolutely reliant on tips....? So AIBU to not tip?