The WONG FOO First-Class Laundry was located on teh ground floor of the old (now demolished) Opera Hall on Woodstock Street North in Tavistock.

Photo published in the Tavistock Gazette - Nov. 8, 1978 - page 7 - http://www.tavistockhistory.ca/sites/default/files/images/IMG_6484.jpeg

See page 157 Fact and Fantasy - http://www.tavistockhistory.ca/factandfantasy/157.html