Someone correct me if I'm wrong, but I think that
all of hamilton's civic museums are free for undergrads? I think I read it in the swag package being handed out.
Even if they're not, here's a
link to information about them all. I'd suggest visiting Dundurn Castle for sure, it's one of my favourite historical landmarks in hamilton.
Other than that, the farmer's market runs some free cooking demonstrations and workshops, open to the entire public, so
that might be worth a look.
In general, if you're looking for events around hamilton, the
hamilton public library's site has a calender on the side that shows some events going on in hamilton.
and of course, there's the
locke street festival coming up.