The Chattanooga Chamber’s North Chattanooga Council is supporting a semi-annual boutique warehouse sale featuring merchandise from several members of the Northshore Merchants Collective, who will offer items at discounts of up to 90 percent off. The two-day special will launch with a Preview Party Sept. 5, from 5-8 p.m. which costs $15 to attend and includes cocktails. Proceeds will benefit the Austin Hatcher Foundation. The event will take place at Stratton Hall, 3146 Broad St.