can an employee be charged for dish breakage in restaurant what can be sold to bars / nightclubs??? | warrior forum ...

OK, I know someone who can go to a lot of bars and nightclubs and he wants to know what products are there besides wine and food that can be sold to these types of businesses.
I know my little part time (Bank bank card terminal point) works well and always has a website, however, does anyone have any thoughts on other products and services that can be sold to bars/nightclubs? ? ?