Why is Mr. Wayne collected by a man with a flashlight?

In a high end movie theatre, orchestra, opera, music, or concert hall, the ushers and security carry small flashlights. It is customary for the ushers to escort a patron to and from their seats if they have to enter or exit the darkened performance hall during the show. Although, the lights on stage or on the screen are significant. The aisles and stairs (normally concrete or carpeted concrete) are very dark. They are normally in the shadow of the seats. And, cellphone usage is usually prohibited.

I worked in venues like these through high school and university. You kept alert for patrons trying to make their way through the dark. You remained ready at the moment so that you could prevent an accident which could, at best, interrupt the performance for other patrons, and at worst, cause an injury. Not only was this a hazard for the patrons, it was a hazard for the venue which could be held liable for injuries.

I think you misunderstood this scene:

• Mr. Wayne is not collected or summoned by this man. Mr. Wayne stands up on his own for a toilet break, then this man (a body guard perhaps) shows a torch so that Mr Wayne can see better while on his way to a bathroom.