Best time to go to restaurants for EasyShift?

Doesn't seem like the app has many downloads in my small city, there's like 6 jobs up.

Little worried about how awkward it will be to take picture of the beverages, they are all like sit down restaurants. Do I just be friendly to the front desk person and ask them to go back there? Guessing I should go when it's not busy at like 2-3 PM?