GrubHub (venture-funded Chicago startup for food delivery) advertises heavily in the subway. One of the founders Mike told me that it works very well for them.

GrubHub (venture-funded Chicago startup for food delivery) advertises heavily in the subway. One of the founders Mike told me that it works very well for them. A few years ago the Chicago rapid transit system was sloppy in replacing the ads, so they got a lot of days of free advertising.