Another cool pic. Just had a thought.. wonder how it was parallel parking one of those with the top up, blind spot, no right side mirror..........
No traffic, no problem. At 1st blush I though it was an old HCCA brass car tour.
They're probably lined up for a tour - notice all the cars appear to have occupants. That's probably also the reason a photo was taken.
That being said, they probably did not parallel park. Each car may have simply pulled up behind the car in front of them, one at a time.
If you look up 4E Main street on Google maps, you'll find the modern version of this photo. The place in the background still has the round window on the second floor.