Glad to see that Cruise Planners is so enchanted with Regent; maybe you can have a group cruise on Regent; Kuki had one on Voyager a number of years back.
Regent has changed their rules on group space; like others.
[ed: moderated for needless comment]
"Carpe diem quam minimum credula postero"
Seven Seas Explorer - Miami - Venice - Mar 2017
Silverseas Explorer - Arctic - Aug 2017
Seven Seas Voyager - Rome to Beijing - Oct 2017
Seven Seas Mariner - Lima to Buenos Aires - Jan 2018
Silverseas Explorer - Siberia - Jul 2018
Seven Seas Mariner - Australia Circumnavigation - Dec 2018