Qualifying guests are invited to hold what is described as a "conversation with Hillary," at a cost of $2,700, the legal limit set by the Federal Election Commission (FEC) on donations to candidates in the 2016 presidential primary cycle.
Clinton, a former secretary of state and the prohibitive favorite for the Democratic nomination, has participated in some 40 fund raising receptions since launching her campaign in April, according to the Sunlight Foundation, a nonpartisan Washington organization that studies campaign financing.
Clinton, 67, holds her first major campaign rally Saturday in New York, one expected to draw thousands of voters.
But who attends the swankier, less publicized functions? Friends of Clinton, influential Democrats, executives, a Facebook co-founder, her husband Bill, and clean-energy billionaire Tom Steyer have participated in the events. On June 29, rocker Bon Jovi will sing for one of the gatherings.
Clinton participated in three receptions Wednesday in three cities in the US northeast.
Prominent Republican rival Jeb Bush regularly commands tens of thousands of dollars per attendee at certain events, in extraordinary cases up to $100,000.
These types of political action committees were born from a 2010 Supreme Court decision allowing unlimited contributions to such groups as a form of free expression, provided the entities remain independent from the candidates and their campaigns.
Bush, a former Florida governor, has yet to announce his candidacy that is expected to occur Monday in Miami. But the PAC's staffers are already talking openly about preparing for Bush's campaign.
Clinton herself will likely hold her nose and open the fundraising floodgates in order to fill Democratic campaign coffers if she is to match Bush's money juggernaut.
A specific goal is already said to have emerged: exceed the $1 billion raised by President Barack Obama, the Democratic Party and affiliated groups for his successfu ..
Clinton is expected to tap into such flows. "She does not have clean hands," said Bill Allison, a senior fellow at Sunlight Foundation.
One candidate who says he refuses to embrace the fundraising leviathan is independent Senator Bernie Sanders, a "Democratic socialist" and Clinton rival in the primaries who believes campaign finance will be a central theme of the election.
"We live in an obscene moment," Sanders said Thursday. "Billionaires are now literally buying American elections and candidates."