I work as a contractor for a small IT company. I recently was informed that a specific client company had switched providers, and I had worked closely with several employees of this company. It would be nice to stay in touch with people I actually worked/interacted with, so I was wondering if it would be frowned upon to stay in touch with them, or ask them for a reference, or maybe add them on LinkedIn? The company that I work for only has one other worker (the owner), but I go days without t...