Option 1

Quietly pull your friend aside to a more private area, speak to them calmly but firmly about their behavior, and suggest leaving the bar immediately to avoid further issues.

Option 2

Immediately approach the bar manager or security, explain the situation, and ask them to intervene and potentially escort your friend out.

Option 3

Pretend you don't know your friend, move to a different part of the bar, and hope the situation resolves itself or someone else deals with it.