I have had some challenges organizing a group dinner for 80 people in Berlin. Looking for something not TOO fancy, but still nice. Budget is about 60-90 Euro per person for food (not including drinks). We are staying at the Ritz and would prefer somewhere within 10-15 in drive. Many places, including Katz Orange and Renger Patzsch, can't fit our group in 1 room (thanks to @linguafood for the original suggestion). I'm now looking at Brochardt (private room); Brasserie at Karlsson Penthouse (private space linked to Brasserie Gendermarket) and Restaurant Richard. Any feedback on these 3? Thank you!