There exist senior clubs where older people can meet and do social activities together. For instance, Griya Adiyuswa in Bintaro offers various activities, including cognitive stimulation therapy for prevention of dementia (Komunitas Lansia Griya Adiyuswa, n.d.).

References:

Komunitas Lansia Griya Adiyuswa. (n.d.). Komunitas Lansia Adiyuswa Senior Club. 2019.