I know this isn't a picture of an architectural element. It is a picture of Sara Bareilles performing at The Showbox in Seattle. I highly recommend seeing a show there. Because of the way it is set up it is possible to see the performers no matter where you are sitting. I don't think I have ever been to this type of venue (one that does not have rows of seats) that is architecturally organized so everyone can see so well.
The only problem with it is that it is so big and spread out when you have someone performing who is not very well known yet such as Sara Bareilles everyone in the back is talking and laughing with their drinks. Usually with a more intimate venue people realize how rude they are being when they are loud.
The Showbox, First and Pike Streets, Seattle, Washington