Sorry maybe a naive view, but I think people are averse to installing one more app to find activities. They can easily find these on Bookmyshow etc already perhaps? What do you think?
But I think you can run a small MVP around how this will work, in small groups of customers who are really looking for this service. Figure feedback and then build an app etc. To run this experiment as a MVP, you can just do it over a whatsapp group, coordinate activities, and see what you find out. 