I give a couple of dollars to the cashiers but that's completely optional.
I know in Reno it's basically required to tip 10%+ to the floors but I don't know how that's been allowed to continue. I've heard tale of other places where a percentage is automatically taken out.
Required tip outs are illegal as of 3 months ago but word doesn't seem to be spreading.
https://www.govtrack.us/congress/bills/115/hr1625
Page 2026
‘‘(B) An employer may not keep tips received by its employees for any purposes, including allowing managers or supervisors to keep any portion of employees’ tips, regardless of whether or not the employer takes a tip credit.’’.
‘‘Any employer who violates section 3(m)(2)(B) shall be liable to the employee or employees affected in the amount of the sum of any tip credit taken by the employer and all such tips unlawfully kept by the employer, and in an additional equal amount as liquidated damages.’’