Even during the earliest years of the Rebbe's nesius, large crowds began to flock to 770 and the building became too small to contain the growing number of people who would attend tefillos. The overcrowding was especially apparent during farbrengens.

For this reason, large farbrengens, such as on Yud Tes Kislev, Yud Shevat and Purim, were held in large rented ballrooms in the neighborhood, while smaller events took place in 770.

Rabbi Avraham Yitzchok Shemtov writes in a letter dated 15th Cheshvan, 5712/1952:

?The Rebbe was asked right at the beginning, before the chaggim, if we should hire a larger place for davening and farbrengens during the High Holy Days. The Rebbe replied: ?The Rebbe [Rayatz] remained within these walls for the final ten years of his life, with all of his tears and his last strengths. So how could I possibly go anywhere else???

Translated from the Kfar Chabad Magazine