We went to a sandwich shop in the evening, their sandwich and the place is rated No. 1 in Tripadvisor. We met the shop manager Luca and he is a very nice and friendly guy. He introduced to you all the interesting sightseeing place in Bologna, he would let you charge your phone, he told me that he would open his wifi for every day even the shop is closed, you can use his toilet, etc. etc.
He also wrote a note on his ipad about the tour spots in Bologna and would share it to anyone. The note is very comprehensive, with location, virtual tour and description. Based on that note, I found that there is a place named "Little Venice". That is a part of Bologna city having canal, and hence we decided to go and see.
Btw, the sandwich shop is called StreeTOAST.