i dont know what warez and such you may use, or even what youd need to run between the board and the laptop...but most medium to large size soundboards have XLR outs...you'll want to find a pair that run into either rca, or mini, depending on what if anything youll be putting inbetwen sbd>pc.
smaller clubs/boards will typically have an rca out. i'd say its best to come prepared and bring both. also, dont forget a lil somethin somethin for the sound guy.