Both locations are just off Queen street, so they should both be reachable by streetcar. You actually had to take a bus to Wave last time because of construction. Not sure if that's still true. Anyone?
Both are also about the same distance away from the nearest subway station, so people coming in from outside TO (which I assume means you effectively start at Union) shouldn't see a difference in commute time if distance is anything to go by. I'm just honestly not sure whether there's a significant traffic flow difference between Queen E and Queen W in the evening.
If we want Haskellers attending in significant numbers, I suggest we finalize a decision on time/location so I can at least drop a line on the haskell-toronto mailing list.
-Leo