Yes they allow cameras
Depends on the event. Some events specify no cameras.
It depends on the event.
Yes cameras are allowed.
Depends on the event. Most tickets will have that information
Absolutely yes you can take a camera inside.
It's dependent on the event
All the concerts I've been to allows a camera
Yes
It really depends on the event, the artist performing, and if they are doing any special filming for a TV/film production.
Cameras are allowed, but not "professional cameras". Also, make sure to have the flash off during the event.
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