Our last day in Montreal and looking for something reasonably priced, Madhatter did not disappoint. Probably one of the most affordable places I've been to in Canada.
Walking in, it looks like your typical pub, but it is truly better than the "average" impression it gave me. I got a "Glad" burger and poutine as a side (impressed more so by the lack of up-charge for poutine). Most dishes are under $10 and there is a $6 specials menu which is really impressive. I got a few pints of Export ($4 each) and I found that extremely reasonable for anywhere I've been in Canada.
The young lady working the bar is very friendly and sociable, quite funny as well! Certainly a great hangout spot for those on a budget.