Jonathan Perry, BOSTON GLOBE.

From the pink hair to platform boots, the glam face paint to the slinky evening gowns, and the people dancing everywhere, the spectacle on the Regent Theatre stage seems more a party than a rock opera.

In some respects, the production feels precisely like that: one big party with live music, courtesy of a killer band made up of no fewer that 18 musicians.

"Hey, you guys know what time it is?" teases MC Sal Clemente, strikingly bald and black-clad standing center stage, "It's rock o'clock. So, you wanna hear some Beatles?"

The question is, of course, rhetorical. Whoops and hollers of approval go up from the nearly 500-strong audience - and a few from the stage, too. That eruption is quickly drowned out by the harmonies, bass line and fuzz guitars that kick into one of a handful of Beatles tunes performed during a 90 minute show packed with vivid covers of Queen, Bowie, the Who and Led Zeppelin.

The URO is an insanely versatile outfit capable of bringing off even the most intricate of rock pieces - say Queen's 'Bohemian Rhapsody' - with effortless ease, lighthearted humor, and an audacious display of vocal prowess.