San Francisco has done an amazing job of keeping the COVID-19 infection level under control, but this still threw me for a loop. This is an overlapping collection of large Halloween parties. Yes, it's outdoors. Yes, the DJ that I could hear (broadcasting from atop a bus) was playing my kind of music. But it still alarmed me to see so many people in one place.
Some of these groups really were keeping their distance from others.
I kept my distance.