Good Eats on the Cheap
Chicago's Chinatown is probably the 2nd or 3rd largest in the country in terms of it's generations of Chinese populace and Chinese owned real estate. Other cities like NYC, SF, LA, and even Boston, also come to mind for Chinatowns, but they are often sprawling and interspersed throughout their respective cities. Chicago's Chinatown feels more planned of recent years, although the organically grown neigborhoods remain intact and retain their immigrant roots.
Here you will undoubtedly find excellent Chinese fare, a few extravangantly priced and presented, most will be reasonable and fantastic, and a handful of terribly westernized abominations that serve their own misguided clientele.
You will have no trouble spending a full morning or afternoon immersing yourself in the still foreign atmosphere along Wentworth and the adjacent sidestreets and, occasionally, feel like you've found another tourist trap in the new Chinatown mall.
For a thrill, hop on the Red Line northbound on the CTA and stop at Argyle Street to compare and contrast the little Chinatown (although there is a growing Vietnamese and Thai population) there.
You can stop for Dim Sum at the touristy Phoenix on Cermak or, better yet, try either Dim Sum restaurants at the West Gate of the New Chinatown Mall where the locals go for affordable and authentic cooking.
For a quick, cheap lunch, there is a variety of provincial Chinese food at Coco, Spring World, Barbeque King, or any of the good Cantonese, Mandarin or Szechuan restaurants that are packed with the over 26 years Chinese crowd. Avoid places that have a bunch of Occidentals (non-Asian) or teenie-twenty somethings, unless you count yourself among the unwashed.