And anybody who can help dispel some of that loneliness for a bit is doing a good thing. Somebody can be at home by themselves or go someplace for a bit of human presence; I can attest the latter is sometimes a godsend. There were times that I could order a pizza to eat at home or go eat pizza at a restaurant and get a bit of interaction with other people--and the restaurant won. No Hooters (nor even a strip club) in my hometown, and becoming a regular at a restaurant was one way to enjoy some regular interaction.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.