Clubhouse has launched a feature to let users virtually wave at friends inside its audio-only chat app to show they are open to a private chat, in a move to expand beyond public rooms that can have thousands of listeners.

source https://gadgets.ndtv.com/social-networking/news/clubhouse-wave-private-chat-invite-room-contacts-friends-feature-android-ios-rollout-2551799#rss-gadgets-all