1 - Partner with some kind of a gym so you can sell inside the gym - fresh healthy juice right after the workouts
2-Partner with Cafeterias either corporate or schools or any other cafeterias - if you walk into corporate cafeterias, there are some really really bad cafeterias that could use a good juice to shore up its customer base
3-This may not be realistic, may be not if you have the will may be this is possible, deliver juice through drones to people that are stuck in traffic - this is probably crazy, but will get you plenty of press, it might make sense to spend all the money that would have gone into PR into something like this
4- Sell the juice in trade shows and conferences, depending on the type of the city
Also check out my book Puga Sankara's Supply Chain Blog - that is a must read before spending Hundreds & Thousands of $$$ on your MBA or Masters Degree to get the best ROI or before starting your Entrepreneurial journey.