PSA; for the next few weeks, the subway will be taking a different route along the Bloor line. Bay station is closed on Saturday and Sunday for construction, and no trains are going through the lower half of St. George. The new route goes from Museum (which runs N, S, E and W trains during this), to St. George's upper floor, then through, as the driver put it, "The Magical World of Lower Bay Station" before going on to Yonge. So, if you've always wondered what Lower Bay station looks like, now's your chance.
On the other hand, be prepared for an extra 10-15 minutes of travel time alng the Bloor line on weekends until this is done.