Dewey Decibel System and Downtown Calgary

loudest place: The Dewey Decibel System Believe it or not, the loudest place in downtown Calgary on Friday night might just end up being the Central Library, according to CBC. It hosting The Dewey Decibel System — a free, all-ages rock concert featuring four local bands. Have a suggestion of your own Put it in the comment section below. 1. The event is in celebration of the opening of a new area on the main floor just for teens. So get there early — doors open at 5 p.m. Along with a great night of free music, the first 150 guests receive a voucher for a free poutine from the Family Fry Guy, who will be on hand serving food at the event. (www.immigrantscanada.com). As reported in the news.