A fun, friendly streetside ride, above ground and with all the interesting outside views you can handle is free, free, free when you ride the shuttle bus. Yes, a shuttle bus is slower, more crowded and discombobulating than a train ride but if the F or G isn’t working it’s the only way to travel! No, really, it’s the only way to travel. And, hey, it’s free. But hey, if you have a monthly metro card, it doesn’t even matter!