I recently took a B2B on Marina. First cruise was the tail end of an extended journey TA and the second cruise was your standard Med cruise. Very few, 33 people, stayed over for the second cruise. The difference between the cruises in regards to mask wearing was night and day. There were signs everywhere that masks were required and staff always had theirs on. However, on the first cruise we were often the only people wearing our masks (KN95) in the theater waiting for excursions to be called. There might have been two other couples with masks on the bus. The second cruise was very different with almost everyone was wearing masks in all close settings, ie bus, theater , tender, etc. There were also a much higher percentage of European guests on board than we typical experience which may have contributed to the difference. I only have anecdotal evidence, but I saw the Tyvex suited crew escorting passengers out of their cabins on the first cruise, but did not see that on the second. The Ship was only half full so it was easy to dine without sharing a table in all venues and we choose to do that even though we typically enjoy sharing tables. I had a wonderful time and would do it again in a heartbeat.