Mitt Romney Event -- Drops $500k on Journey Concert

ANY WAY YOU WANT IT ... is exactly what the band Journey said when they were offered $500,000 to play a campaign event for Mitt Romney ... and they accepted, TMZ has learned.

Sources tell TMZ ... the shin-dig is set to go down at a private fundraising party in Tampa, FL on Thursday night while the Republican National Convention is in town. We're told the American Action Network threw down a whopping $500,000 to secure the 90-minute set.

Sources tell us ... Journey is NOT making a political statement by accepting the offer and made it clear -- it's just another gig.