langar is based on Sikhism for the community kitchen in a Gurdwara where a free meal is served to all the visitors, without distinction of religion, caste, gender, economic status or ethnicity. The free meal is always vegetarian.People sit on the floor, eat together, and the kitchen is maintained .
In Sikhism, the practice of the langar, or free kitchen, is believed to have been started by the first Sikh Guru, Guru Nanak. It was designed to uphold the principle of equality between all people regardless of religion, caste, colour, creed, age, gender or social status. The second Guru of Sikhism, Guru Angad is remembered in Sikh tradition for systematizing the institution of langar in all Sikh temple premises, where visitors from near and far, could get a free simple meal in a communal seating.He also set rules and training method for volunteers (sevadars) who operated the kitchen, placing emphasis on treating it as a place of rest and refuge, being always polite and hospitable to all visitors. Guru Amar Das also encouraged the practice of langar and made all those who visited him attend la?gar before they could speak to him.
Some scholars state that Guru Amar Das, who joined Sikhism from the Vaishnavism Hindu tradition, introduced the vegetarianism at langars