If you have a hankering for some TASTY guacamole and chips, try Maya on 2nd near Folsom in SF. One of the best restaurant renditions I've had in a long time. Nice big chunks of avocado with a good garlic kick. The tortilla chips were warm, fresh, and crispy. Their happy hour is from 5-7pm where you're treated to a creamy black bean dip and some fried appetizers.
Can't say much else about the rest of the food though. The entrees our table ordered (Chicken Mole, Pechuga Adobada, and Carnitas Maya) were only average at best.