Birthday Details When Riverbend hosts parties on Saturdays and Sundays. Weekdays are available on a case by case basis. Party time slots include 10 am -12 pm, 1 pm-3 pm. or 4 pm - 6:00 pm. The birthday family is welcome to come a half hour early and stay a half hour later for set-up and clean-up. Registration All Riverbend parties are designed to accommodate the birthday child and up to 19 guests (adults not included). Payment in full is due at the time of booking to reserve your date.