So first rule of networking is to be nice to each other. The games community is very small and people talk to each other. Epic dunks will get you Karma on reddit, but also plenty of bad karma in real life.

Anyway the caption made it confusing that why I asked, but I guess you want to network, because you're looking for a job? So in early development stages we usually visit local community Playtesting Events (like Pizza Playtest in Munich). It helps with getting external feedback and validation for a prototype and getting to know your local games community. Some events are worth attending regardless of the development stage, like GodotFest or Gamescom.