Añejo's happy hour is the best around (but tragically only 3-5pm). $2.50 tacos? Yes please! And they aren't sad little happy hour tacos ... They're huge and have a bunch of hot sauces to pair up! Make sure you ask for the complimentary pico de gallo to throw on top!
The guacamole is as good as it gets. They make it right at your table (the awkwardness is worth it).
If you like spicy, try the chilli coconut margarita. It's my favourite drink I've ever had.