ArtWalk take place approximately every six weeks on Saturday evenings throughout the year . ArtWalk is organized by Galveston Arts Center , which release an ArtWalk brochure featuring a map of participating venues as well as descriptions of shows and exhibits . Venues include GAC , Galveston Artist Residency and artist ’ s studios and galleries . Additionally , art is shown in “ other walls ” — for example MOD Coffeehouse or Mosquito Cafe — or outdoors at Art Market on Market Street . Musicians perform outdoors and at venues such as the Proletariat Gallery & Public House or Old Quarter Acoustic Cafe . While most ArtWalk events are concentrated downtown , there are a number or participants elsewhere on the island .