Photography: Ava Porter Words: Matthew O'Shannessy On the second Thursday of every month, Downtown Los Angeles is for art lovers. If you've ever found yourself near Spring and Sixth Streets or Gallery Row between 6pm and 10pm on one of these evenings, you may have noticed throngs of people filing in and out of hole-in-the-wall galleries or enjoying an exhibition inside, wine glass in hand. These crowds are here for the Downtown Los Angeles Art Walk, a regular event that has been running in and around the Historic Core for 13 years. Less a formal tour than a rambling social