Showrooms Our showrooms are open by appointment only.  Please contact our showroom manager Christine Meredith at 312-661-1442 or cm@onesourcechicago.com to schedule a showing. Suite 3-115 Merchandise Mart Davis Showroom Suite 347 Merchandise Mart Ekitta, Martin Brattrud, & Nessen Lighting Showroom Suite 1619A Merchandise Mart Nessen Lighting, Fontana Arte, One Furniture Group, David Edward, Amberwood, & Cortina Leathers Showroom