Bartenders need liquor license

No, bartenders do not need a liquer license. You may be required by your state to have a license to be a bartender, but a liquer license is not needed. Lliquer license is required by a business that sells alcohol, not the server. If you are required to have a license, it is usually very simple and may have a nominal cost, $10-$50 for a usually one time license - or no cost at all. The place you work should pay for any license/registration you may need.