I'm with Charlie and Don F on this one.

Sorry Don M, but I don't think you're right about a private residence being subject to the ADA

From the 'FindLaw' site (Americans With Disabilities Act: Questions and Answers by the U.S. Department of Justice)

"Q. Does the ADA cover private apartments and private homes?

A. The ADA does not cover strictly residential private apartments and homes. If, however, a place of public accommodation, such as a doctor's office or day care center, is located in a private residence, those portions of the residence used for that purpose are subject to the ADA's requirements."

This is talking about places of business which are permanently located in private residences and presumably have employees which should be protected as well as patrons. It's not referring to once-a-month or other occasional events held in a home. It's not talking about house concerts or Tupperware parties or reunions or anything else, regardless of how and to whom these events are advertised.

It also says:

For answers to additional questions, call the ADA Information Line

    800-514-0301 (voice)

    800-514-0383 (TDD)