Thank you everyone for your offers of sledding companionship - especially sledding-pal Max, who emailed me an hour after I had posted, assuring me that sledding fun could happen with baby and wife (who is also a friend, I don't want to make it sound like she's just some appendage of Max's) with us taking turns holding baby at the top or something. So that's something to look forward to, once it stops raining and starts snowing again. Because it will start snowing again, don't be fooled.
Just now a guy walked out of the law office across the alleyway, grabbed a handful of snow from the sidewalk, looked around sneakily, and walked back inside. I suspect some semi-legal hijinks are about to happen!