Mr. Obama will fly to New York on Tuesday for a lavish Democratic Party fund-raising dinner at the Mandarin Oriental Hotel for about 200 big donors. Each donor is paying the legal maximum of $30,400 and is allowed to take a date. Four of the seven “co-chairs” listed on the invitation work in finance, and Democratic Party organizers say they expect that about a third of the attendees will come from the industry.

But from the financial giants like Goldman Sachs, JPMorgan Chase and Citigroup that received federal bailout money — and whose bankers raised millions of dollars for Mr. Obama’s election — only a half-dozen or fewer are expected to attend (estimated total contribution: $91,200).

Part of the reason, several Democratic fund-raisers and executives said, is a fear of getting caught in the public rage over the perception that Wall Street titans profiting from their government bailout may use their winnings to give back to Washington in return. And the timing of the event, as the industry lobbies against proposals for tighter regulations to address the underlying causes of last year’s meltdown on Wall Street, has only added to the worry over public appearances.