Dining solo while female can get you banned from the bar. I am not making this up.
On a recent trip to Manhattan, [business executive Clementine Crawford] said she visited Nello for an early dinner and took her usual place at the bar, but was quickly confronted by an “oddly hesitant” waiter who informed her that she was “no longer permitted to eat” at the bar and “must now sit down at a table.” Crawford was tired from her flight, so obliged without thinking. But she said the same thing happened when she returned to the restaurant a few days later.
More details here, here and here.
(By way of information, I am not related to the woman in the story.)