There are no hard and fast rules for chanting Hare Krishna. One can chant Hare Krishna anywhere. Children, for example, also chant and dance. It is not at all difficult. While walking, our students take their beads with them and chant. Where is the loss? But the gain is very great, for by chanting we associate with Krishna personally. Suppose we were to associate personally with the President. How proud we would feel. “Oh, I am with the President.” So should we not feel very much proud if we were to associate with the supreme president, who is able to create many millions of presidents like those of this world? This chanting is our opportunity to do so. Therefore Caitanya Mahaprabhu says, “My dear Lord, You are so kind to me that You are always prepared to give me Your association. But I am so unfortunate that I do not take advantage of this opportunity.”
Our Krishna consciousness movement is simply requesting people, “Chant Hare Krishna.” There was a cartoon in some newspaper that depicted an old lady and her husband sitting face to face. The lady is requesting her husband, “Chant, chant, chant.” And the husband is answering, “Can’t, can’t, can’t.” So in this same way, we are requesting everyone, “Please chant, chant, chant.” But they are replying, “Can’t, can’t, can’t.” This is their misfortune.
Still, it is our duty to make all such unfortunate creatures fortunate. That is our mission. Therefore we go into the street and chant. Although they say “Can’t,” we go on chanting. That is our duty.
Ref >> Srila Prabhupada Vani.