I'm not in the Hamilton area but I do know there is a Toronto poly, or maybe several, group & I THINK there's one in Hamilton. I'll ask around on the Toronto group and see what I can find or you can email them here firstname.lastname@example.org
There's a group on LiveJournal for the Hamilton area as well, if you're a member.
Come to think of it we're going to be in Hamilton at the Convention Center, on the 3rd floor, on Saturday afternoon volunteering at Sexapalooza. If you're looking for something to do, or someone to talk to, swing by the Dungeon and ask for Robin
. I'll be in the Dungeon between 1 and 5:00