ANSWER: Yes, Challenges, regardless of whether they are location-specific, are visible to all customers in the Mariana Tek app.
For example, if the NYC studio sets up a "10 classes in 30 days" challenge for NYC only, LA clients would also see the challenge in their app.
The Challenge Locations field when creating a Challenge dictates which classes qualify for the Challenge. It does not dictate which locations can see it.
We recommend placing the location in the title of each Challenge.