I have been visiting Chicago for more than a year now and I must say that the best Margaritas can be found at Las Mananitas on N. Halsted in the heart of Boys Town. Ask for a golden unblended with the Cuervo and Grand Marnier with salt you won't be dissappointed. Also, when they have it, try the Sopa de Mariscos. It is a very rich sea food dish served in a rather large bowl ( to accomadate the crab legs) and it goes well with the former. Enjoy
Chicago, IL