Adult only. Private by design.
What starting another round does

The button is after a reveal. It uses yeses that are already in, and it does not repeat a partner.
The short answer
Start another round is a key party button after the current pairs are revealed. Your host invites friends. The host invites friends they'd love to have there. One private link per couple. The note says checked-in guests are paired again from the yeses they already gave.
Each person gets a new Play Partner they have not had. Answering stays closed. Check-ins stay. A released address stays. Everyone sees the new pairs after the countdown.
Adult only. Private by design. You confirm you are 18 or older. The host still checks you in. A private no stays private.
When the button stays off
It needs a full pairing where nobody is repeated from an earlier round. If that pairing is not there, the note says there are not enough mutual matches for everyone to get a new partner. The tip says who would be left without a new one.
It does not run before the current round is revealed. Couples only pairs each couple once, so that night does not start another round. A play party and a speed date do not use this button.
This is not Add a round. Add a round changes how many rounds are planned. Start another round is the button after a reveal, and it does not open the cards again.
What it does not repeat
It is not Allow a repeat match. That switch is for a later round only when no unused pairing is left. This button refuses to start unless a fresh full pairing exists.
It is not Re-roll. Re-roll picks another full pairing before the reveal. This button starts the next revealed round.
A night in San Diego can use the button. Tampa can too. Those cities have their own pages. The yeses still live on the party.
The new round is still a reveal
All mutual-yes matches are revealed by the format the host already chose. A new round does not show a one-sided yes. A one-sided yes stays hidden.
A key party shows one Play Partner at the same time, after the host starts the reveal. A play party keeps matches hidden until the host reveals them. A speed date is short rounds, then yes or no.
FAQ
Does it ask people to answer again?
No. Answering stays closed. The new pairs come from yeses they already gave.
Can it repeat a Play Partner?
No. Each person gets a new Play Partner they have not had. If that full pairing is gone, the button stays off.
Does couples only use it?
No. Couples only pairs each couple once. A play party and a speed date do not use this button.
Is this the same as Re-roll?
No. Re-roll picks another pairing before the reveal. Start another round happens after a reveal.
When do matches show?
All mutual-yes matches are revealed by the format. A key party shows one Play Partner at the same time, after the host starts the reveal. A play party keeps matches hidden until the host reveals them. A speed date is short rounds, then yes or no.