Final answer:
Joining in with the group's activities without introducing yourself will not help negotiate access to a closed/non-public setting.
Step-by-step explanation:
Out of the given options, joining in with the group's activities without introducing yourself will not help you negotiate access to a closed/non-public setting. When trying to gain access to a closed setting, it is important to establish connections and build relationships within the organization or group. Options a, b, and d involve gaining support from key individuals or offering something of value in return, which can help you negotiate access. It's the relational groundwork, leveraging connections, and demonstrating value that effectively paves the way into these exclusive domains.