I have been to Rio more thAn once where the manager has asked me if I left a tip. considering I went there often I always asked for one particular waiter knowing I would have great service.since he no longer works there I ha e quit going there to eat. Tonight when we were paying for our food the manager asked my husband to leave a tip.he replied no because our service was terrible. He then continued to harass him for a tip.my husband finally left two dollars and let it be.the manager then started to harass our friends also for a tip.they denied and left..I will never walk back in those doors to eat or for anything. I will not give my business to someone who harassed me for a tip nor to a waitress who is rude and doesn't do her job! Very unprofessional!!!