Open while it's warm - one of the few bars to make use of the park running along the river, the Maincafé is no more than a bunch of tables and a beertap in a park. It's an incredibly popular spot on warm nights, when hundreds of people lounge around on the grass, Weissbier in hand, to watch the sun set behind the skyscrapers and the pretty lights come on. Beer, cocktails and tasty snacks are available. Find it on the southern Main bank, near the Architecture Museum and between the Untermainbrücke and Holbeinsteg bridge.