Travelzoo is offering vouchers for some nice places in Berlin (and in other cities as well)
They offer a Gin Tasting in the House of Gin (Hotel Palace), Breakfast for two in the Manzini for 20 €. I like their breakfast, they have high quality cheese and cold cuts and a very nice service. Good Coffee too!
There a several other places offered as well. I don’t know them, but it looks okay.