Assuming you keep to your plan to dine at Bazaar and that you'll stay at the SLS - I thought of a vacation-y, relaxing thing you may want to do in lieu of a walk around the "city".

The grounds and courtyard of Greystone Mansion are open to the public and parking is free. It seems to me that taking a stroll around the estate could be a lovely way to spend some of your afternoon, nice photo ops and all. You'll see on the link that it is closed sometimes due to events, so do call the number to double check that it's open on your day. (I was inspired to suggest this because there's currently a bunch of flag ads along the streets announcing this weekend's Greystone Mansion Concours d'Elegance ).

Here are the driving directions from the SLS.

But of course, if you stay at the Andaz or London, you'll be even closer.

And here are the google images of Greystone to give you an idea - lots of wedding pix tho:
http://www.google.com/search?q=greys...w=1440&bih=710

This link to the Friends of Greystone website though gives its history, and other info