Marshall created a popular pizza for Riverside earlier in the year called the “Gabbizza,” which is available exclusively at the 22 and Vine restaurant inside the resort. RIVERSIDE, IOWA (November 9, 2023) - Riverside Casino and Golf Resort is hosting a Gabbie Marshall meet-and-greet for guests and fans of all ages on Friday, November 17, 5–7PM, at the main entrance to the casino.