"Corner bars" popped up all over cities such as Pompeii? Meaning

Good day, EF comunity. I am reading a book about wine history.

I have noticed a sentence: Corner bars popped up all over cities such
as Pompeii.

I did not understand the phrase "corner bars"

Is it some sort of street bar which were popular in ancient time?

Here is a bit more context for better understanding:

By the first century CE, Rome was awash with wine. Each person in
the city of Rome drank on average half a liter each day. Winemaking techniques
had spread from Italy to Spain, Germany, England, and France, and
those regions developed their own vineyards. You could certainly call this
the world’s first wine boom. Corner bars popped up all over cities such
as Pompeii.

Kind regards from Ukraine,

Danil.