Hmmm.. talking about hole in the walls... there is an amazing burger restaurant called Hole in the Wall. It is literally a hole in the wall. It is behind Winchell's doughnuts, but it's always packed! When you walk into the "restaurant" on the left hand side you will see a tin can filled with sharpies and stacks of papers. The papers let you create your burger however you want, or order the burger of the week. You then can give your order to the person at the cash register and pay there. They call out your name when your burger is done. Once, my sister's friend put on the card "Voldemort" and my sister put "Albus Severus Potter". The man at the counter actually said "Albus Severus Potter" but instead of saying "Voldemort" he said "The one whose name shall not be spoken"
When you get your burger, it's going to look massive. However the burgers are so delicious you can always eat one all by yourself. Sharing would be recommended if you are expecting a regular burger. The meat is cooked perfectly and the condiments are so unique. There is Cranberry Mayo, homemade ketchup, onion mayo, and Chipotle mayo. They also allow you to add "extra stuff" for an extra $1.00 each, which include apple wood smoked bacon, avocado, fried egg (my personal favorite), sauteed mushrooms, and sauteed onions. The brioche bun is really good and fluffy. You can add fries or sweet potato fries to go with your burger too.
Although the place is a hole in the wall, they managed to make it very pleasant, especially on warm days. You can sit outside, which is very nice when the weather is warm, and they have sailboat sails that they roll out above to allow some shade. It's very relaxing, however you don't pay much attention to that when your eating your massive, yet gourmet, burger. (This is at the Santa Monica location at least... I never went to the one in West Hollywood)
They have two locations:
11058 Santa Monica Blvd.
at South Bentley Avenue (behind Winchell's Donuts)
7998 Santa Monica Blvd.
at Laurel Ave. (1 block east of Crescent Heights)
Their website is pretty hilarious, and very informative, check it out!
I think that they only take cash, but check the website to find out more information.