what i used to do (Something Corporate, Lucky Boys Confusion, Riddlin Kids, etc) was to try to patch out of the DCN feed if the club had it. (Granada Theatre and Bottleneck in Lawrence, Ranch Bowl in Omaha I helped run and mix, Blue Note in Columbia, Mississippi Nights in St Louis, a few others that I can think of... etc). Usually they either have a built in DAT that they'd let me use, or RCA outs from either their board or their mixer, depending.