The 4As has one of the best sites to do research on agencies in the city that you might want to work for and how to get savvy about what is going on in the industry. See link at: http://www.aaaa.org/Pages/default.aspx They also run the MAIP program (Multi-cultural internship advertising program) which takes Spring interns. However, on the MAIP site, you can see the agencies that take part in MAIP and might want to consider these would be good agencies to target on your search. The applications for these internships are submitted in the fall–for example, this year, the deadline was in October. See web site at http://maip.aaaa.org/agencies/#2015-maip-agencies for information about the program. A PDF of the 2016 Spring applications is attached below—the current application form is completely online and is no longer available to review but it had similar requirements to the PDF below.
See this link for the disciplines for MAIP