em i know that its supposed to be about £600 for the tivioli and that includes the soundman (but i could be totally wrong there) the only problem is that you cant play before about half 11 due to the fact that there tends to be plays on there before that and so you cant be disturbing the nice theatre goers with your angry brand of young ragmuffin metal. Anyway if its feasible i think itd be lovely cause the tivoli is my favourite venue ever.......ever i say!!!!