The same was true in London, Ontario at the Body Life Convention. Three people showed up for the only tennis related presentation. The major reason for the above is largely economic. Making a living is very difficult in the tennis industry. Consequently, good people get diverted to other careers.
Tennis is very relationship driven.
Good people attract other good people. Witness the effect Jack Sharpe has had on the whole community of Aurora, Illinois, hardly a tennis Mecca. Bad enough so that most of the clubs in existence today would never exist if they were built today. Specifically, if most clubs were built in today's dollars they could not support themselves given what they charge for membership and court time. The price of indoor tennis has not kept pace with the rest of the economy.