From a 1905 genealogy:

Hon. Edward F. Brush, M.D., the present Mayor of Mount Vernon, N.Y. He enlisted in a Maine Regiment in 1864. Later he studied medicine, and has been Health Officer of Mount Vernon, President of the N.Y. Society of Medical Jurisprudence, etc. He is extensively engaged in the manufacture of kumiss. Dr. Brush is serving his second term as Mayor. He is a member of the Baptist Church. He married Miss Marion Beers, and they have ten children.

And an article from 1910 which I don't have full access to wrote that Dr. E. F. Brush introduced Kumiss to New York around 1880.

At one time they were owned by Wells, Richardson & Co., a Vermont company. Makes me think it is a picture taken in the U.S. or Canada.

Oh! Diamond Dyes. I spent so long furrowing my brow at "DIAMOND D ES." (Try getting any useful Google searches for that one.)

Another reason I suspect this is an American scene is that this slide was mixed in with a lot of slides taken in Oil City, Pennsylvania . It might not mean anything -- just a hunch.

On the drugstore window is a sign for for "Diamond Dyes" minus a few letters. A popular way to tint all your socks for just a few pennies.

The thing attracting attention looks like a street organ similar to the one shown here.

[And that's in London. The gas lamp in the Apotheke photo has a certain London vibe to it. - Dave]

I'm pretty sure it's an American scene too, for the same reason.

The sign was hard to make out. I suspect it might say "Harris Seigel" or possibly just "Harris Shoes."

I looked all over the place for any combination of Lauer and various druggists or pharmacies ... no dice. For a while I thought I had it pinned down in New York, but now I forget why.

Do you think that ... thing ... they're clustered around could be a calliope?

Observations: Looks circa 1900 to me. And probably not in Germany, where there wouldn't be any reason to call your pharmacy a "German pharmacy." There were, however, dozens of Deutsche Apothekes in the immigrant neighborhoods of New York, where the Deutsche Apotheker Verein (German Pharmacy Union) was formed in 1851 -- the oldest pharmaceutical society in the United States.

A blowup of the shoe sign across the street would be helpful -- is it lettered in English?

Would guess around 1920, but without any vehicles shown it is a challenge to put a date on this pic. Something has really got the small crowd's interest on the sidewalk.

There was a Dr. Anton Lauer who was a pharmacist in Bavaria. He went on become curatorial office pharmacist for the German Pharmacy Museum.

This is a German pharmacy -- kumiss is mare's milk.