Hair Salons For Lupus Is It Customary To Give Tips In Hair Salons Here In Singapore? How Much?

Is it customary to give tips in hair salons here in Singapore? How much? - hair salons for lupus

My haircut in Singapore for the first time in an upscale salon. I read from the Singapore warehouse is not the norm, but I'm not sure if this (for the beauty salons especially true passion). Should I tip the designer of the "boss"? What about the person, the shampoo / dry my hair? If so, how can I give? Is it based on the share?

Thank you.