I’m a Mexican fan and have had good experiences with two places in Arlington, both near Metro stops. Guajillo (pronounced Wa-Hee-Yo) is in a small set of shops at 1727 Wilson Boulevard, just outside of Rosslyn. There’s also a good coffee shop next door. The other is Mexicali Blues at 2933 Wilson Boulevard. It specializes in Mexican and Central American food. Great food and drink – very colorful and cheery.