Essentially I think this is "high society", people with respectable jobs, working for respectable companies. Not your mechanics, cleaners or factory workers who hang out at the pub every Friday, but your doctors, lawyers, programmers and suit-types that goto events, and the pub on a Friday night.

I've always heard and would agree with the phrase, "success breeds success". Surround yourself with people you consider to be successful. Same thing applies here, except your setting up play dates.