Bustling, friendly, rooster-themed cafe serves freshly made juices, steaming cups of cappuccino, waffles, cakes, eggs all-day and .... The absolute spiciest cabbage (beef?) goulash I've ever eaten in my life. Just beware of that one.
This place is an institution in Mainz, why? Nice easy atmosphere, food is good, service friendly and fair prices. Take your newspaper or IPad and chill out over a nice breakfast.