IRVING, TEXAS — Hangover Opportunity Fund LLC, a fund managed by Arlington-based Skywalker Property Partners, has sold a three-building, 66,885-square-foot office campus in Irving to an undisclosed oil and gas firm. The buildings are situated on 4.6 acres at 6301, 6321 and 6341 Campus Circle Drive, just outside Dallas-Fort Worth International Airport. The property recently underwent a $350,000 capital improvements program to repair foundations and underground plumbing, revamp the landscaping and develop office suites on a speculative basis. Matt Hurlbut of Transwestern represented the seller in the all-cash transaction. Zack Stevens of NAI Robert Lynn represented the buyer.