Hi Doug, how are you? Here's how we've done it. It's turned into a
very popular event and has displaced guitar hero in our tournament
lineup.
1. Sign up 4-player bands. Each band must pick a name, this is half
the fun.
2. Announce bands that are recruiting players to match up players who
don't have a band.
3. Allow "Vocaltar", meaning allow 3-player bands where one player
players guitar and bass while singing (requires mike stand)
4. Go through the list of bands twice. Bands can play whatever song
they like at whatever difficulty they like, with one exception: overly
long songs are banned. It's hard to find a list of rock band songs
with duration so we usually just say "long songs are banned" and the
players adhere to it.
5. Record each band's top score for however many chances they get if
time allows more than 2 passes.
6. Take the top 4 or the top 2 bands onto elimination depending on
time remaining. We've done both allowing the top band to set the song
that all bands must play and letting each band choose their best song
for the finals. Both work out well.
We then award prizes to all 4 players of the top 2 bands.
Hope that helps! Let me know if you have any other questions.
-eli