Octogenarians.
A group of people descended from the same ancestor is a family or a bunch of relatives. Sometimes, if more organized, they may be called a clan or a tribe.
A sociologist would refer to two or more people who identify or interact with one another as a "social group." This term encompasses various types of relationships, from casual acquaintances to close-knit communities.
culture
It's called an archipelago.
It is estimated that over 2.5 million people are employed in Indian call centers.
a group of seniors. ------------------------ Nothing: With your attitude, they won't come to you anyway!
A group of people call the socs.
pee
A septet.
Genocide
A group, crowd,
The audience.
blassyem
Mob
One-hundred years is what we call a century.
You could call it a mixed group with varying interests or a diverse group with different priorities.
A 'demographic'