Greek Open Houses Alumni Weekend at WPI will be celebrated May 19 through 21 in 2023. Stay tuned for information about Greek organizations hosting open houses during Alumni Weekend 2023. Site Menu Sidebar Menu Alumni Weekend Greek Open Houses Thank you to these chapters that hosted open houses during Alumni Weekend 2022! Alpha Gamma Delta Alpha Tau Omega Beta Theta Pi Lambda Chi Alpha Phi Sigma Sigma Phi Sigma Kappa Sigma Alpha Epsilon Sigma Pi