Sambuca con Mosca

This licorice-flavored Italian cordial is a popular drink of choice throughout Italy, both as a shot or in an 'old-fashion/rocks' glass. Most of you have probably seen or at least heard of it, but did you know it comes in different colors? From what I understand they all taste the same, but you can find it in white, purple, red, or black.

So I'm sure you're wondering what "con mosca" means in the title.
When served in a 'rocks' glass, it is not uncommon for the bartender to garnish the drink (upon request or not) with three coffee beans.
The three beans are said to symbolize health, happiness, and prosperity.

But..

If you were to be given 4 beans in your drink, this is not 'vabbene'.
Not only is it bad luck to garnish a drink with an even number, but the history of this coffee bean tradition comes from acting as a warning.
Bartenders would alert Mafia members to be aware that other undercover agents were around. This fourth bean basically meant to, 'get out while you can' or prepare for a fight.
Similarly, this tactic was supposedly used to warn US and British soldiers that undercover German spies were in the area.

Oh, and feel free to have it lit on fire, which is a typical way of serving it as a shot.
(Any liquor/cordial that is 40-50% alcohol, or 80-100 proof will light on fire.)