The big idea When Black diners get poorer service from wait staff and bartenders than white customers, it’s more likely because of racial bias than the well-documented fact that they tip less, according to a new survey I recently published. To reach that conclusion, my colleague Gerald Nowak and I recruited over 700 mostly white full-service restaurant servers and bartenders to review a hypothetical dining scenario that randomly involved either white or Black customers. We then asked them to predict the tip that the table would leave, the likelihood that the table would exhibit undesirable dining behaviors and the quality...