Up for some serious beanage? Three words: El. Burrito. Loco. It's really huge, it's really cheap and it's really good, which is probably why we always have to wait for a table at this tiny, friendly South Side burrito stand. Although all the other tortilla treats at El Burrito Loco come in more diminutive dimensions, the corpulent vegetarian burrito is, for mysterious reasons (maybe because it's loco?), available only as a jumbo ten-incher. Bloated with refried beans, orange rice, pico de gallo, sour cream and guacamole (with which essential condiment the cook is quite generous), the immoderate Burrito Loco can easily feed two people with reasonably nonloco appetites. What is loco is that, at just $4.50, it's the most extravagant thing on the menu.