For more info on this subject, please visit the Rants, Raves, and Reviews section. We DO have a few very important writings that many try to follow, and these can be viewed at MoonRaven's Beginning Wicca Pages . Wicca is a very open religion. We do not have a standardized network of churches. The main reason behind this is the fact that this religion was basically founded by solitaries and Covens.
Covens are basically the equivalent of Churches.
A solitary Practitioner is one who practices the religion alone. They typically spend full moons and cast spells alone or with a loved one. They may, at certain times, come together with friends for Sabbats. They typically study by themselves, or with a friend or two, over the internet or in person. They do not have an affiliation with a formal coven.