... Tipping behavior is not only influenced from various factors such as restaurant's environment, weather condition, type of payment, type of music played at the restaurant, but also from the customers' traits and genders (Seiter & Gass, 2005). Moreover, it is observed that there are a wide range of effective factors such as the amount of invoice (Rind & Strohmetz, 2001), amiability of employees (Lynn, Zinkhan, & Harris, 1993), service quality (Fernandez, 2004;Miller, 2010), gender of customers (Parrett, 2006), frequency of the service taken (Bodvarsson & Gibson, 1997), payment type (Parret, 2006), number of people at the meal (Rind & Bordia, 1996), ethnic origins (McCall & Lynn, 2009, communication skills of workers (Kinard & Kinard, 2013;Seiter & Weger, 2013), religious believes (Lynn & Katz, 2013), and alcohol consumption (Bodvarsson & Gibson, 1997). ...