It may not be allowed to avoid subsequent use of one ticket by multiple people, or even simultaneous use by giving the ticket to someone before the ticket check (if this is physically possible), but it may also be allowed, e.g., in a movie theatre to allow the stub holder to use the facilities (restroom, telephone, water fountain) or buy, during a movie, a snack or drink before the ticket check and reenter.
It is not permitted for one ticket to be used by multiple people consecutively or given to someone before being checked. However, it might be allowed in movie theaters, such as allowing the holder of a stub to use facilities like restrooms and telephones, or buy snacks or drinks during a film without needing to recheck the ticket.