On any given day, the lawn hugging McGovern Lake at Hermann Park is a serene backdrop dotted with strolling families meandering about the bridges, basking in the genteel waters and listening to the sounds of the sparkling fountain.

But on Thursday night, thankfully Mother Nature held her wrath just long enough for the banks of the man-made mere to morph into a hot al fresco nightspot fitting for the chic throng of 400 nature-loving captains and maidens at Urban Green's "Come Sail Away" — pedal boat rides at dusk included.

With white loungers alongside the Ai Weiwei's Zodiac heads, it may have been a stylish thump-thumping Ibiza club where seafarer fashions were in vogue. These young professionals took the nautical theme to heart: Dapper gents in khaki shorts, penny loafers, blazers, captain caps and the occasional neckerchief mingled with darling gals in navy stripes and over-the-shoulder cardigans.

While some opted for the high-decibel DJ MAV grooves and depleted supplies of Saint Arnold Brewing Company suds and frosty Cuba Libres by Under the Volcano, adorable couples drifted hand-in-hand for a tête-à-tête rendezvous overlooking the sunset.

Ahoy to chairs Catherine Bradley, Amy and David Doherty, Mary and Ben Patton and Sarahbeth Pipkin who anchored one heck of a full-throttle party for the Hermann Park Conservancy group, which rouses support to keep the grounds ripe and eco-happy.

Beaming from ear to ear, development director Meghan Miller and marketing manager Eliza Wright were awash with bliss as the record-setting turnout pored over the silent auction, raising $22,000.

On board were Kristy and Chris Bradshaw, Rachel Ehrhardt, newlyweds Joey and Nicole Laurent Romano, Kevin Dewhurst, Tom Broughton, Nic Phillips, Caroline Urquhart andLee Ryan Foersterling, Sammy Ford,Urban Green committee chairBrittany Sakowitz and Kevin Kushner, Annie Criner and Campbell Eifler, Courtland Crosswell, Georgea Pappas, John Guess IV, Will Hixon, Valerie and Tracy Dieterich, Nyanza and Erik Moore andDivya and Chris Brown.