7-Eleven 525 Oak Grove Ave, Menlo Park, CA94025 A very well kept 7-Eleven with friendly staff, superb customer service and fully stocked shelves. According to the…More manager, it has the best Slurpees in Menlo Park. The coffee is fresh every morning and can go fast because of workers catching the Caltrain into the city. It has plenty of regulars because of its location and an ATM tucked in the corner. It's open 24 hours and has been at this location since 1968.