It's going to be really hot this weekend. Is everyone aware of this? Be careful out there. The good news is that there are some very nice places on this week's open house tour and they probably have air conditioning. Have you ever gone to see a movie just to be able to cool off for a couple hours? You can do the same thing with open houses and they're free. And you might be given a Perrier or something. All of this weekend's open houses are on Sunday and within walking distance. Enjoy. Stay hydrated. (As always, the map is after the jump and additional details are in the captions of the photos above.)