Events & Fundraisers Pika Buggy Sweepstakes The Pike Beta Sigma organization has been recognized as one of the most “winningest” teams during Carnegie Mellon’s annual Buggy Sweepstakes race. What is Buggy? Click on the button below to learn more. Learn More about Buggy Greek Sing Each year, the Beta Sigma Chapter brothers partners up with a sister sorority to put on a show in order to raise money for a philanthropic cause. In the past 5 years, our chapter has raised over $10,000 for a range of causes. Donate to our Greek Sing Philanthropy Athletics In addition to competing in Varsity sports, Beta Sigma brothers love to compete in all types of athletic competitions. This past year, we have won multiple championships in both Intramural and philanthropic sporting events.