Dive bars beat an overpriced nightclub any day of the week. The following things give a dive it's signature "charm":

 

1. A name lacking any pretention whatsoever

You Know Youre In a Dive Bar When
coolhandlucas


2. The marquee has words of drinking encouragement

You Know Youre In a Dive Bar When
ChimpJuice


3. The bathroom is tiny. Need-to-carve-a-hole-into-the-door tiny.

You Know Youre In a Dive Bar When
JonBravo


4. The toilet seat is missing

You Know Youre In a Dive Bar When
ColinD1


5. The mirror is missing, too, but has an adequate replacement

You Know Youre In a Dive Bar When
Slapguts


6. Bathroom humor goes 5 levels deep

You Know Youre In a Dive Bar When
dmackerman


7. There's a sign asking you not to puke in the urinal

You Know Youre In a Dive Bar When
archimedic


8. The Do-Not-Serve list is long enough to have a sense of humor about itself

You Know Youre In a Dive Bar When
stendhalian


9. The smoking policy levels with you

You Know Youre In a Dive Bar When
FishtanksG


10. The health standards are super, super stringent

You Know Youre In a Dive Bar When
lowyoyostuff


11. ...this is just about the best they can do

You Know Youre In a Dive Bar When
StaticKeptSecret