Have you seen them in concert?
I have seen them three separate times in concert. Mumford and Sons are fantastic live.
I haven't seen them live.  I would love to someday though.
Have you seen any band play live? I have also gotten to see Metallica.
I have seen several, like Kelly Clarkson and Snow Patrol
That is really cool. Did you see Snow Patrol in the United States or in England?
In the US, it was several years ago, but so awesome!  It is a different experience seeing a band live.
I actually have been to raves as well which are a little different from concerts. deadmau5 was fantastic live.
I am a little scared of raves. Are they dangerous?
As long as you don't take any drugs or anything, you'll be fine.
Nice.  Sounds like a blast.