Circe worshipped Hecate Chaos and Nyx.
Moly
You can change Gods, but you can't worship 2 gods at the same time in the same village (temple).
because he is cursed by the gods
A magical herb called moly.
The ancient Greeks worshiped their gods for the same reason that any spiritual-religious people engage in worship: they believed that their gods were real, that those gods desired worship and reverence, and that those gods would reward those who worshiped them. While the Greek notion of "god" and "gods" changed significantly over the centuries, the fundamental reason for worshipping them did not.
they worship kachina dolls who were there gods
no
They worship the gods by holding ceremonies to certain gods, and make sacrifices in their honor.
Norse gods
Yes Chinese people do worship many gods
No the Romans did not force the Jews to worship their gods.
the people of sumer practiced polytheism the worship of many gods
They would worship their own gods
Jains worship at a Deraser.
Moly
There is no real answer to this. Christians worship God and Jesus and Hindus worship a plethora of gods, one god, or no gods at all.
No, the ancient Egyptians did not have to worship their gods and goddesses, it was a part of their faith and belief that they chose to.