Playing golf with clients is one way to 'mix business with pleasure'. [=to do something enjoyable that is related to your work]
I accidentally 'mixed up' the two files. [=I put each of the files in the place where the other one should have gone]
He 'got mixed up in' a plan to destroy the government. [=he became involved in a plan to destroy the government]
(..) Some corporate types, outsiders. Make you seem like a renegade. Corporate, from where? Oil, banking, mostly. Some tech. Occasional D.C. lifer sprinkled into the mix to make sure the trains run on time. I was going over our list for vice president. Yeah. Hold on. Uh, this will seem unexpected, (..)2017 TvShow: House of Cards Title: Chapter 65 Season: 5 Episode 13