History.
People have pooled money together for more than 5000 years.
Today, savings clubs are used by communities all over the world. Some groups pay into a shared pool every week or month and give the total to one person at a time (rotation), and others keep building the pool for when someone needs it (accumulation).
There is a name for them in every language:
Ajo

Nigeria
Arisan

Indonesia
Ayuto

Somalia
Bausparen

Germany
Chama

Kenya
Chilimba

Zimbabwe
Chilimba

Uganda
Chilimba

Zambia
Chiperegani

Malawi
Chit

India
Committee / کمیٹی

Pakistan
Consorcio

Brazil
Cuchubál

Guatemala
Dhukuti / धुकुटी/ढिकुटी

Nepal
Didlum

United Kingdom
Dijji

Ivory Coast
Djanggi

Cameroon
ekub / እቁብ

Ethiopia
Esu

Bahamas
Esusu

Nigeria
Gün

Turkey
gye / 계/契

South Korea
Hagbad

Somalia
Hamamei

Papua New Guinea
hui / 會

China
hui / 會

Taiwan
Ikelemba

DR Congo
Junta

Peru
Kongsi

Brunei
lenshare / เล่นแชร์

Thailand
Menage

Scotland
Nájom

Benin
Ngwa

Cameroon
Njangi

Cameroon
Osassa

DR Congo
Paluwagan

Malaysia
Paluwagan

Singapore
Paluwagan

Philippines
Pandero

Peru
Pardna / Box

Jamaica
Passanaku

Bolivia
Stokvel

South Africa
Susu

Nigeria
Susu

Sierra Leone
Susu

The Gambia
Susu

Trinidad and Tobago
Tanda

Mexico
tanomoshiko / 頼母子講

Japan
Tontine

Benin
Tontine

Malaysia
Tontine

Singapore
Tontine

Senegal
Tontine

France
Xitique

Mozambique
جمعية / gam'eya

Egypt