FORTUNE.COM - Aug 9 - For many companies, fraternities and sororities were the keys to early success. When Tinder started, Justin Mateen hosted a huge party at his parents' California home in September 2012 and invited popular sorority sisters and fraternity brothers from several colleges in the area. The ticket to the party was a Tinder download. A 2014 Gallup poll found that being involved in a fraternity or sorority may boost one's interest in entrepreneurship. Of the 30k college graduates surveyed, those who had participated in Greek life were more likely to start their own businesses than those who hadn't. The entrepreneurs behind companies such as Uber, Snapchat, Dropbox, Lyft, Blue Apron, EventBrite, and Warby Parker all pledged fraternities in college. So did the founders of Fortune 500 companies like Nike, Wal-Mart, and Home Depot.