Perhaps the world's coolest hole in the wall: Cafe No Se
by Jipsydelcuadro
Dark, laid back with a bohemian vibe, live music, kooky decorations, live-in dogs, and plenty of characters to chat with. If you come during the day enjoy the great food! I recommend the veggie burro. If you come for a night out, be sure to enjoy some of the 'illegal' mezcal or tequila...just follow the road to perdition (you'll find it). A great place with plenty of personality, good times and great people! And if you're lucky, they might even let you stay after hours.
Very laid back. Suits need not enter.