If you sit at the bar, even when it's slow, you basically need to flag down a bartender to order anything...and be specific, such as "I would like to order food" so they'll bring a menu. Such things are not automatic here.
Practice your flagging technique. You'll need it.
Also, practice your patience because when they actually do stop to wait on you, they will act very put out.
Good for them the fried chicken is truly excellent