I can provide you with a hypothetical example to illustrate a situation where an informal group operates within a formal organization.

Hypothetical Scenario:

In a large corporation, a group of employees from different departments form an informal organization to address concerns about recent changes in company policies. These employees share a common interest in preserving the company's traditional values and culture, and they feel that the recent policy changes threaten these aspects of the organization.

What drew the informal group together was their shared belief in preserving the company's traditional values and culture, and their opposition to the recent policy changes. The group was formed to represent the views and concerns of employees who felt disenfranchised by the decision$-$making process and to find ways to reverse or modify the policy changes.

The informal group was formed to represent the views and concerns of employees who felt disenfranchised by the decision$-$making process and to find ways to reverse or modify the policy changes.

The informal group was not necessarily obvious to others within the organization, as they operated primarily in private communication channels and did not make their activities public. However, some employees may have been aware of the group's existence and its objectives.

The informal group dissipated over time as the employees involved moved on to other projects or left the organization. The group's efforts to address the concerns about the policy changes were ultimately unsuccessful, and the policy changes remained in place.

Final answer: It's important to note that this scenario is purely hypothetical and does not reflect any actual events or people within a specific organization.