It is my understanding that all the in-person services of the CIC have been discontinued for some time.
Simplyproductive please let us know if you have personal experience or knowledge of in-person drop offs.
http://york.cioc.ca/record/HMT1187 "As of June 1, 2012, CIC offices in Canada will offer in-person services by appointment only."
http://www.cic.gc.ca/english/information/offices/help.asp "CIC offices in Canada - By appointment only"
I have never heard of the CIC giving someone an appointment to drop off their RQ documents.