Address book: invite only certain people, sort, and export

Invite a group, not everyone

In the Address Book, add a tag to each contact who belongs to the group (for example "Room parents").
Go to the Address Book (from an event, Share → Address Book) and click that tag to filter the list to those contacts.
Select the contacts you want. An Invite button appears at the top once at least one contact is selected.
Click Invite and choose the event.

Sort and search

Click a column heading (Name, Email, Phone or Tags) to sort. The search box filters by name, email or phone. To filter by tag, click the tag itself in the Tags row above the list.

Export

Select the contacts you want, then click Export CSV — the button appears at the top once at least one contact is selected. The file has name, email, phone, and optionally the events each contact hosted, signed up for, or was invited to. Tags are not yet included in the export — filter by tag, select those contacts, and export them if you need one group.

Print

There is no print button yet: export the CSV and print it from your spreadsheet app.

Undo an import

There is no undo. Contacts created by an import carry the tag you gave the import (or the file's name), so filter by that tag, select the contacts, and delete them.

Import contacts from a CSV → Import Contacts