My old club in Austin TX (Great Hills) did something similar and it was a great way to drive visibility to a pretty well hidden neighborhood club.
Every spring, weekend after the Masters, we advertised within the neighborhood (mail and signage) an "Open House". We put on an outdoor Texas BBQ with Open Beer & Wine, tours of the facility, tennis clinic and free rounds to those who registered in advance.
We'd make contact with about 30-50 new families each year and easily landed 5-10 new members through that. However, due to the transitory nature of the city, that only tackled about 30-50% of our annual turnover.