Just finishing up 3 night stay with a room on the Regency Club floor (7) with a view towards west Berlin. Arrived just after 1300 from Madrid and the front desk clerk escorted me to the Regency Club while my room was being prepared, about a 30 min wait, and then came back upstairs with the key. One thing I have found consistent with Hyatt, at least at the Diamond level, is that they're usually able to check me in versus having me leave a bag and come back. I did have the lounge offerings as my dinner the first two nights and found them quite adequate- assortment of cheeses, roast beef, potato salad, chicken, various salads, all served in small jars (sort of a half-size Mason jar for those familiar with them). I particularly enjoyed the Reisling Brut on offer. I noticed one group was there when I arrived about 1900 before going out one night, and when I came back for a cold drink at 2145 they were still there. Clearly the lounge is well-liked by some.