Final answer:
Tammy, Lisa, Bartolo, Shonda, and Roberto constitute an informal group. An informal group is a spontaneous group formed outside of the formal organizational structure for various purposes, such as socializing and discussing work-related topics.
Step-by-step explanation:
In this scenario, Tammy, Lisa, Bartolo, Shonda, and Roberto would constitute an informal group.
An informal group is a group that forms spontaneously due to shared interests or common goals outside of the formal organizational structure. These groups can be formed for various reasons, such as socializing, networking, or discussing work-related topics. The Lux Lounge Happy Hour is an example of an informal gathering where these coworkers come together to get to know each other better and talk about work.