There are over 130 different tribes in Tanzania. Each has its own customs and traditions and its own language or dialect. Some tribes are large and some are small, and they have each held onto their traditional ways to different degrees. All speak Swahali though, the language taught in their schools, making them surprisingly bi-lingual.
The Hadzabe are a small tribe, numbering less than one thousand, and indigenous to the Lake Eyasi area of Tanzania. They are traditional hunter gatherers, they do not raise any cattle or grow any food. They have no rules or calendars. They do not keep track of days, months, years, or even hours. Time is measured only through cycles of the sun and moon. Their existence has changed little in 10,000 years. But, they are gregarious and welcoming.