Not “on” first. We know that was Who. Instead who was here first?
It is an interesting mix of businesses, although not surprising. My guess is that customers of Bob are not adverse to stopping in at the place next door. I could see either of these businesses make a decision to locate next to the other one. Both create a draw.
I suppose it’s possible that both have the same owner, although they have fairly dissimilar business models.
On closer look I see that Bob’s neighbor is for sale. I’m sure the pandemic did not help.