I will be in Berlin for two weeks in April. The first week I will be with clients at Hotel Berlin for a conference. I need to take a small group to dinner three or four nights while I am there. I speak German and would like to visit some more authentic, less Americanized restaurants in the area. Walking distance would be nice, but a short taxi or public transit ride would be fine. My fantasy would be to find a few places without an English menu where there are more Germans than tourists. They don't have to be fancy or expensive. These are techies, not executives. What can you suggest? Thanks.