June 4 Omaha Rollergirls vs. Chicago Outfit Roller Derby Mid-America Center, One Arena Way, Council Bluffs 7 p.m., $10 adv, $12 DOS, omaharollergirls.org, (712) 323-0536 There's just something satisfying about a good body check, be it hockey, football or roller derby. For their last bout of the season, the Omaha Rollergirls will be taking on the Chicago Outfit. If you haven't seen a Derby before, imagine some of the most-ass kicking women you've seen, vying to take the lead ahead of the other team, whose single handed goal is to stop you dead in your tracks. It's not dainty — it's got all the brutality of a hockey game, but with less jokes about Canada. And this is the last time this season to check it out, so why wouldn't you?