Union Market also extended their hours to close at 11:30pm on weekdays and 11pm on Sundays (Saturday they still close at 4:30).
Tim Hortons in the student centre also extended their hours to midnight on weekdays. They are also open on weekends, but the hours of operation depend on the day.
The Williams in HSC is also open later, but only by an hour closing at 10pm on weekdays.
For a full list of hours of operations for places run by hospitality, click this link:
http://hospitality.mcmaster. ca/loc..._REVISE D.pdf