Meadows was a Presbyterian, a Mason, and a member of numerous professional, civic, and social organizations, including the American Petroleum Institute, Independent Petroleum Association, Dallas Petroleum Club, Dallas Art Association, Dallas Citizens Council, and Sigma Nu fraternity.
In January 1990, Martinez won the All campus Southwest Texas State Talent show as a Sigma Nu by singing his rendition of "La Bamba" and "Twist and Shout".
Sigma Nu (ΣΝ) is an undergraduate college fraternity that was founded by James Frank Hopkins, Greenfield Quarles and James McIlvaine Riley at the Virginia Military Institute in Lexington, Virginia shortly after Hopkins witnessed what he considered a hazing ritual by upperclassmen at the Virginia Military Institute.
•
On July 10, 1884, Sigma Nu’s first convention was held in the Maxwell House Hotel in Nashville, Tennessee.
Sigma Chi | Sigma Xi | Sigma Alpha Epsilon | Delta Sigma Theta | Phi Beta Sigma | Sigma Corporation | Sigma Alpha Mu | Sigma Phi Epsilon | Sigma | Kappa Sigma | Beta Gamma Sigma | Tau Beta Sigma | Six Sigma | Sigma Alpha Iota | Phi Sigma Kappa | SK Sigma Olomouc | Sigma SD14 | Sigma Gamma Rho | Phi Sigma Epsilon | Delta Sigma Pi | Sigma Tau Gamma | Sigma Sigma Sigma | Sigma Nu | Sigma Kappa | Phi Kappa Sigma | Lean Six Sigma | Beta Sigma Phi | Alpha Sigma Phi | Alpha Chi Sigma | Team IG-Sigma Sport |
While at VMI, James Frank Hopkins, Greenfield Quarles and Riley became close friends and founded Sigma Nu fraternity.