Mass Ave district to hold first workshop to plan for future growthINDIANAPOLIS (WISH) — The Mass Ave Cultural Arts District in downtown Indianapolis will have its first land-use workshop Thursday to preserve the area’s history while planning for its future. Residents, business owners and workers are invited to share ideas for the district. Organizers say nearly 20% of the land is vacant, including parking lots and empty buildings. He said organizers are seeking community input on future solutions for the area. Thursday will be the first of three Mass Ave Next Vision Plan workshops scheduled for this year.