ShantiNiketan — Hindi for "House of Peace" — is one of a number of growing niche retirement communities aimed at people of specific ethnic backgrounds, hobbies or college allegiances. Niche retirement communities are growing particularly popular as the 76 million baby boomers — a generation accustomed to molding traditional institutions in their image — are reaching retirement age. The mass-market retirement communities like Florida's The Villages, Arizona's Sun City and California's Leisure World — popular with previous generations — will be competing with smaller, targeted developments, said Dan Owens, director of the National Active Retirement Association. ShantiNiketan's opening was timed for the retirement of a major wave of Indian immigrants who came to the United States in the 1960s and 1970s, said Jeffrey Ignatius, president of the company that built the community about 35 miles from Walt Disney World. A clubhouse in the center of the condos holds a dining room, kitchen, a worship room with an enormous shrine holding icons of Hindu gods Shiva and Ganesh and an exercise room. An assisted living facility also will be built, and a similar community is being planned in New Jersey, which has the largest concentration of Indians in the United States. Geeta Chandran has jumped into planning the holiday festivities and the karaoke nights, but she misses having U.S.-born friends in her primary social circle. Arvind Patel, a former electrical engineer, said they're now in the "fourth phase" of their lives — past childhood, schooling and raising a family — when they want to concentrate on spiritual matters not material goods.