Where is this????

[famine68]

I finish a song, then get a message that "a band has challenged you to a rock off!" What is this and where do I go to do it?

[Keebler]

Try the city/venue with the unique icon next to it.

[famine68]

The only icon I have left is the roadie one...what does the icon look like?

[Mojo Risin]

The only icon I have left is the roadie one...what does the icon look like?

That's the icon you're looking for. Once you beat the set, you take the other band's roadies and unlock larger venues.

Hope this helps!