Serendipidty, if you are talking about Mexico, here is the documentation, straight from the WTS...when did you stop going to the meetings, I wonder; this was in the 1995 Yearbook.
yb95
pp. 212-213 Mexico ***For these and other reasons, the Society decided that it would be wise to reorganize, with a view to giving greater emphasis to the educational nature of our work. Therefore, on June 10, 1943, application was made to the Secretariat of Foreign Affairs to register La Torre del Vigía as a civil society, and this was approved on June 15, 1943.
With this rearrangement, singing at our meetings was discontinued, and the meeting places became known as Halls for Cultural Studies. No audible prayers were said at meetings, though nothing could prevent a person from saying an earnest prayer silently in his heart. Every appearance of a religious service was avoided, and truly our meetings are designed for education. When Witnesses in other lands began to call their local groups "congregations," the Witnesses in Mexico kept on using the term "companies." House-to-house visits by the Witnesses continued, and with even more zeal; but direct use of the Bible at doors was avoided. Instead, publishers learned the texts by heart so that they could quote them. They also made good use of the book "Make Sure of All Things," which is a compilation of Scripture quotations on many subjects. Only on return visits and on studies (which were termed "cultural" instead of "Bible") was the Bible itself used.
In 1989, with the approval of the Governing Body, a letter was written to all the "companies" saying that as of April 1, we would be operating in Mexico as a religious organization. Afterward, in the June issue of Nuestro Ministerio del Reino (Our Kingdom Ministry), which was changed from being called Informador (Informant) de la Torre del Vigía, further details were given. From then on, the Bible would be used from door to door, and prayers would be offered at meetings. Later, we began to sing songs at the meetings.