blockbuster and walmart both test, ive worked at both
where do you live? if there's a giant or martains (grocery stores) around you, i know for sure they don't- i'm not sure about other groceries.

or move out of the states
i worked for the IRD in NZ and me and most the people i knew there smoked quite often- no drug tests at all

good luck man. and if you have to, just give the weed up for a month. it sucks but its better than being out on the streets.