Regent just came out a few weeks ago with a program so groups can make a group booking BUT you will be looking at a SET menu and that would totally ruin the whole Prime 7 dining experience. I strongly advise against doing that. There are also too many of you anyway for that program. That program is not going to work in my opinion and will die a natural death. People do not want a set menu in a speciality restaurant.
So you must all make these bookings independently. You should form up into groups of 4 - 6, you cannot book more than 6 per table online. Then agree on the time to book and then have one person at the table become 'the leader" to reserve the table as soon as the bookings open. Each table leader needs to have the booking number and cabin number for their table mates to reserve on line.
Regent is very strict now and you must give your table companions information at booking or they seat you with strangers. Once a passengers information is entered ONE time they are then blocked from another reservation in that dining room.
So you will be staggered over the night within the intervals the reservations normally are taken.
Some planning is required here past "count me in" so thought I would pop in and mention this to everyone. No one person can control this for everyone else and the only way to make this work is as I outlined above.
Even if I was on this ship and trying to do this for you there is no way I could handle a group this size, all on a specific night without a set menu. I talked to one of the General Managers about dining reservations and I cannot email FLL or the ships with any kind of request anymore they are working STRICTLY by the on line system in an effort to be fair to everyone.
So if you REALLY want this to happen get your table mates set - so one person has all the information necessary to book on line for that specific table. Only possible way this can be accomplished.