Some ppl say langar is for needy, for poor etc. I believe langar is for everyone. Concept is each one of us share and each one of us eat together like brothers. So if beggar comes and eat, let him. Encourage him to share, by doing sewa.
Ohnu embrace karo, ohnu dutkaro naa. Ohnu sewa lao, Guru de sache parshade shak oh v kirti bann je.