I've been to the O2 before but never to the Indigo. It is a really cool location and it was a great vibe at the Asian Dub Foundation concert! Didn't know the band before either and they were great too! There is a general admission area downstairs and some seats upstairs. It wasn't too packed so we could dance all night long and you could find your friends again when you went to the bar for another drink. The only minus point is for the bar where the minimum spend on card is 10 pounds... for me that never has cash this was terrible but my friends were happy since I bought them a drink too to get up to 10 pounds. read more