Venturers are those who seek excitement, unpredictability and chance in life. Forster is one such venturer, but finds his life in New York too boringly predictable.
But when he meets Ives, the latter suggests they dine in a posh hotel together although neither has any money with them, and then toss a coin to see which of them will bear the consequences when they are unable to pay. The escapade turns out to have consequences which neither of them could have predicted.