•Desire for good service in the future.
•Desire for social approval.
•To compensate servers equitably for their work (i.e.reward their effort).
•Desire for status and power.
Furthermore,Lynn(1996 and 2003) reports on research which suggests a number of ways in which servers'are likely to increase their tips:
•Server introduction in agenuine and professional manner.
•Squatting next to table though this is more likely to work in a casual dinning environment,compared to fine-dining where it may be considered inappropriate.
•Smiling at customers.
•Touching customers.
•Credit card insignia on tip trays.