The hotel bar is indeed an unusual social confluence.

An unusual confluence of weather events made the floods particularly severe.

The extra precautions have been taken to respond to an unusual confluence of events that has many anti-terrorist experts worried.

"It's a fairly unusual confluence of events," he said.

In an unusual confluence, both junk and long-term bonds have shone lately.

Members of both parties said the health and education spending measure fell victim to a unusual confluence of legislative circumstances.

You have an unusual confluence of three factors working in their favor in 1987 and 1988.

It's an unusual confluence of beliefs, but one that is tolerated by many of the protectorate's residents.

The conflicting assessments reflect in part an unusual confluence of two wrenching issues during the last few years.

An unusual confluence of factors seems to be responsible for the surge.