Harry Houdini's final performance in 1926 was at the long gone Garrick Theater, center left.

In 1907, the czar of the American legitimate theatre, Abe Erlanger, approached the equally ambitious Shuberts to form Advanced Vaudeville, intended as a threat to Keith-Albee’s vaudeville hegemony in the eastern half of the USA. Erlanger had the money; Lee Schubert had acquired more theaters than he and brother Jake had shows to fill. They drew William Morris, a respected vaudeville man with experience as an agent, booker and theatre manager, into their scheme, not as a partner who knew their true goal was to shake down E. F. Albee and B. F. Keith, but as a salaried talent scout of sorts. Erlanger supplied him with a line of credit and sent Morris forth to sign as many vaudeville acts as possible.

Your source for Vaudeville here:

https://epdf.pub/vaudeville-old-and-new-an-encyclopedia-of-variety-perfo...

Basic Vaudeville as well as the Windsor Ballet were found across the river in Ontario.

Here is an interesting article on People's Outfitting and its buildings:

https://www.historicdetroit.org/buildings/peoples-outfitting-co-building

At least four buildings in the photo are still there:

Brown Brothers Tobacco - 6 stories on the right, was built as a cigar factory.

Capitol Park Building - 10 stories, center right, was built for Smith & Sons grocery. At the time of the photo, their grocery store occupied the first 5 floors. Now lofts.

Detroit Savings Bank Building - 12 stories, left, is Detroit's oldest skyscraper, now houses the Archdiocese of Detroit.

Dime Building - 23 stories, center, a Shorpy regular!

I'm wondering if folks parked their cars back then or just abandoned them.

I wasn't aware there were different levels of vaudeville. So, where did one go for basic vaudeville?