Mark Evanier also prefers Five Guys to In-n-Out after his visit to the East Coast.

For a burger qua burger, the second-best burger I had in Los Angeles was at Jeff's Gourmet. Which is Glatt Kosher, so no cheeseburger or bacon topping or milkshake or food on Saturday, which is certainly a downside for the secularly-minded. (The best was at the now-closed Mo Better Meaty Meat Burger, which probably added to the flavor just by the name alone.)