Take niche housing.
These days, a number of properties cater to a select subset of residents, much like boutique hotels.
"We've reached the stage of evolution where rather than all these assisted living facilities looking alike, recognizing that there's a very large population of seniors out there so we can divide into specialty housing," says Carle.
For example, Aegis Gardens in Fremont, California, is tailored toward the needs of Asian seniors. The staff members speak English and Chinese, and the architecture is based on the design principles of feng shui. Cultural activities include tai chi and calligraphy.
There are also roughly two dozen assisted living facilities targeted to the gay and lesbian population, a facility for nudists in Florida, and an adult day care community in Livingston, Texas, called Escapees Care Center, dedicated to retirees who live in recreational vehicles, or RVs, and aren't inclined to give up that lifestyle.
"The parking spots are wheelchair-accessible, and nurse aides visit the RVs throughout the day to serve meals and help residents get dressed or take medication," says Carle.