It is generous to pay for everyone's items.
Bob brought all of his friends to the bar after a hard day's work.
Bob wants his friends to have fun.
Bob brings everyone into the bar and buys everyone from work a drink from the bar.
Bob orders drinks for everyone but then expects them to pay for those drinks.
Everyone from work is very pleased with Bob's generosity.
Some people got confused and thought Bob was buying them all a drink.