Karl’s Event Services, Oak Creek, Wis., has been acquired by the Arena Group, a global provider of temporary structures, seating, design and overlay services for live events. Arena operates from multiple locations in the U.K., Dubai, Singapore, Malaysia, Portugal, Spain and now the U.S. Karl’s has supported events throughout the U.S., including the Super Bowl, Mercedes Benz New York Fashion Week, the PGA and NASCAR, among others.