system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How do I get in to the party at Stark Tower at the beginning of Age of Ultron? Who do I have to know?
gpt
You gotta know an Avenger, or Pepper.

Pretty much everyone in that room was on a first-name basis with at least one Avenger; all of the SHIELD people were old buds, the assorted veterans were pals with Captain America, and so on. Pepper, meanwhile, pretty much owns the building, so if you've got an in with her, she's probably the best non-Avenger to get you on the guest list. 

This isn't really a conventional social gathering, so more conventional networking probably wouldn't make the nut for getting in there, and gatecrashing would be tricky, at best; given that the Avengers are openly at war with Hydra, anyone showing up at the door without an invitation is in real danger of getting put in a headlock by an Iron Legion drone.