greek mythology?followers?

Religions and traditions rarely disappear altogether, they usually evolve/blend into other faiths and traditions over time, so the answer is "yes, sort of"

Yes many people still do, Yes, Zeus is very real, just as much as any other God is. Hellenismos, in its deeper meaning, is the noble path that promotes the development of personal excellence known as aræti. It is a way of life, working with the natural world by means of Natural Laws, through the worship of the pantheon of Gods of ancient Greece, in particular, the Twelve Olympians, and examining life through means of genuine philosophy. There are many terms currently in use, such as Hellenismos, Olympianism, Dodekatheism, Hellenic polytheism, Hellenism, Hellenic paganism, Hellenic pantheism, Greek pantheism, Hellenic reconstructionism, the ancient Greek religion, or simply, the worship of the Hellenic Gods. Hellenismos is a path, a journey, a way of living your life, the way of aræti. We practice what is called eusebeia, which is a type of piety, a reverence towards the Gods, your parents, the world, the cosmos. Hellenismos is both a religion and more than a religion. Hellenismos is the heart of our religion. Hellenismos is a way of life which utilizes genuine philosophy and which has as its outward expression thriskia: religion. Thriskia is the organized worship and ritual of the ancient Hellenic polytheistic tradition, especially the outward expression of belief in the Theoi (the Gods). The Gods exist as conscious entities.

I don't believe in their Gods, but I certainly do enjoy other Greek stuff....

Hellenic neo-paganism

http://web.eecs.utk.edu/~mclennan/BA/HNP.html

Yes, there are.

yes, they're called xtians.