Meetings or correspondence may be consistent (a weekly coffee meeting to talk shop) and frequent (an ongoing email dialogue about a variety of issues).

FORBES: Finding the Ideal Entrepreneur Mentor

Talk at the local coffee shop is often about the freshly minted millionaires and their newly built trophy homes.

ECONOMIST: American holidays

The two often met at a coffee shop on Lexington Avenue in the years before Bernard Madoff's arrest to talk about markets and technology.

WSJ: Mark Madoff and the Fraud's Burden