ZIRX Closes $6.4M in Series A Funding From Norwest Venture Partners and Trinity Ventures; Plans in the Works to Expand Its On-Demand Valet Parking Service to Multiple US Cities SAN FRANCISCO, CA--(Marketwired - Sep 5, 2014) -  ZIRX, the leading on-demand valet parking service, today announced it has closed $6.4M in Series A financing jointly led by Norwest Venture...