Grubhub Onsite and Hilton are extending their collaboration, now offering on-demand delivery of groceries and convenience items to more than 2,600 hotels under the Hampton by Hilton, Tru by Hilton, and Spark by Hilton umbrella of brands. Guests at these properties can now access Grubhub’s expansive marketplace of more than 375,000 merchants. Guests just have to scan a QR code to shop while vacationing. To further enhance the experience, guests will receive one free month of Grubhub+, which includes perks like free delivery fees....