Team Rooms can support an unlimited number of retrospective participants. Large retrospectives can be more challenging to run, but the benefits can be worth the effort!
Tips to facilitate a retrospective for large groups
Before the Retrospective
If possible, invite your users to the Team Room a few days in advance of the retrospective or set your Team Room to public if you would like non-members and guests to be able to join via a link instead of inviting them to join your Team Room and organization.
When participants can access the room in advance, it also gives them a chance to get familiar with the app before the day of the retrospective.
During the Retrospective
Create a set of working agreements that include Retrium-specific best practices so that participants respect the space and are not clicking things you don't want them to (for example, taking over facilitation duties). You may want to create this and distribute it in advance of the retrospective. This document should be reviewed at the beginning of the retrospective with all participants.
Large retrospectives can be assisted by asynchronous data collection. Once everyone has access to the Team Room in Retrium, you can share the link to a newly created retrospective and encourage everyone to add notes in advance of the meeting, so you can focus the meeting on the discussion with the group rather than waiting for participants to think and type.
For the Group phase, you may want to consider an alternative grouping technique. Rather than have all participants group, another option would be to try designated grouping (choosing a few people to group cards during the discussion).