Reported: By Bloomberg, that Topgolf International is working with investment banks on an initial public offering that could value the golf-entertainment company at about $4 billion, according to a news service report, which cited sources familiar with the negotiations. The IPO could come as soon as this year for the Dallas-based company, which operates driving range/nightclub sites in the U.S., United Kingdom and Australia, with plans to expand into Canada, Mexico and the United Arab Emirates.