As is widely thought in some circles, Sundays are supposed to be a day of rest. That obviously doesn't include the party fiends that cram into Scottsdale's El Hefe every week for one final fete before the weekend's done. Kicking off in the afternoon, 4-2-10 Sundays are five-alarm ragers of beats, booze, and scandalous behavior that typically go past midnight and fill the Saddlebag Trail taquería to capacity. As a result, the SRO situation includes tabletops and booths becoming improvised dance floors as DJs like resident Thomas James sling Top 40 and electro-house from a catwalk. Hits aren't the only thing raining down, as go-go girls fire off CO2 cannons and confetti poppers while standing atop El Hefe's bar. And at one off-the-hook party 4-2-10 party last month, a number of inflatable zebras were dropped from the ceiling, adding a touch of wildlife to an already wild scene.