67 is on one of the most well known streets in Exarcheia, Benaki street. Even on weekdays, the street is full of people who enjoy some wine or raki. The prices are low but the atmosphere priceless. You can even sit comfortably outside during the weekend.
Walking on Benaki street, you will see a different neighborhood of Athens. In 67 you can either go for coffee or early drinks. Try going early so you can find a table outside and gaze locals passing through. The place let's you stay for as long as you want, with no pressure.
Try the soup of the the day.