In the anecdata of my family & friends who have done both, they have come to expect a higher percentage on bar tabs (~20%) than on restaurant tabs (~15%).
There's a ton of factors to consider, of course. Some people get angry when drunk, some get loose with their money, some try to impress. Some people are surprised by large bar tabs and feel cheated. And all the normal factors, like that certain groups are notoriously tight with their money.
There's a ton of factors to consider, of course. Some people get angry when drunk, some get loose with their money, some try to impress. Some people are surprised by large bar tabs and feel cheated. And all the normal factors, like that certain groups are notoriously tight with their money.