It's getting warmer and you'll see more friends and couples riding tandem bikes together. Please be careful when passing them, as many of them are preoccupied taking pictures, laughing, talking etc...which all lead to them sometimes using up the whole lane and wobbling back and forth.
And if you see them looking alike, you're not seeing double. In Korea it's very fashionable to wear matching, couples' clothing to show that you're a couple and an item.
Keep in mind people of all ages with all types of different bicycles might not be paying attention and might cut you off at anytime. Ride smart...ride safe.
The main spots to ride slower are: