Concerts, like dimly lit chandeliers, are more impressive outdoors and are more enchanting when adorned with strategically placed glow sticks. Take a fresh breath of music with today’s GrouponLive deal: for $35, you get one general-admission ticket to the X-FEST Calgary 2011 on Saturday, August 20, at Fort Calgary (a $79.29 value before fees, or up to a $93.25 value online, including all ticketing fees and GST). Gates open at 11:30 a.m.

X92.9 flexes a muscular mix of alternative-rock legends and tomorrow’s darlings as this summer’s outdoor X-FEST Calgary fills historic Fort Calgary with good vibrations. This year’s lineup springs from the earth like a talented series of Whac-a-Mole, featuring Jane’s Addiction. Recharged, regroomed, and sporting their first new album in years, Perry Farrell and the crew rock and rampage like veteran teenagers. Returning to Calgary to thank fans and get their toothbrush back, Weezer take the fest by the scruff of its neck and stroke its chin, eliciting audiences to purr along to their deep bowl of hits. X-FEST also features appearances by warhorse punkers Social Distortion, bounding enthusiasts House of Pain, and throbbing adventurists AWOLNATION. A slew of prime Canadian rockers is also on hand to charm attendees, including The Rural Alberta Advantage and Michael Bernard Fitzgerald.

Just east of downtown Calgary, the normally quiet and peaceful Fort Calgary is perfectly fortified to quarantine the X-FEST’s epidemic of rock. Nearby beer and vendor gardens are on hand for replenishing pogo muscles and for rehydrating fans after encore sweats. Check the handy information guide for questions about dos-and-how-dare-yous of proper event etiquette and how many beach balls and lawn mowers to bring.