Since it's slow here at work, I thought I'd be a nerd.
By googling Founders Road, Indianapolis, I found the following orgs have HQs there:
Alpha Xi Delta
Theta Chi
Alpha Gamma Delta
Zeta Tau Alpha
Kappa Alpha Theta
Tau Kappa Epsilon
Sigma Kappa
Lambda Chi Alpha
Other groups headquartered in Indy, but not on Founders Road, include:
Alpha Chi Omega
Alpha Tau Omega
Alpha Sigma Phi
Alpha Kappa Lambda
Alpha Epsilon Pi
Delta Sigma Phi
Delta Upsilon
Phi Epsilon Kappa
Phi Kappa Psi
Phi Sigma Kappa
Sigma Delta Tau
Psi Upsilon
Zeta Beta Tau
Now, I'm not so bored as to actually visit all these websites to verify what I've found, so if I've got something wrong, let me know.