Doors Open Minneapolis is a weekend-long event that gives the public a chance to explore the buildings that tell the city’s story, Saturday and Sunday May 18-19. They need volunteers to welcome attendees to the venues and count them as they enter, encourage attendees to register for Doors Open Minneapolis via a mobile QR code or web link and be entered in a raffle to win prizes, distribute stickers to attendees, assist with the flow of foot traffic and answer…