Check out Flockstr - Organize events on Nostr, own your flock.
  https://nostrapp.link/a/naddr1qqxnzd3e8qmn2wf58q6rzvejqgsrx4k7vxeev3unrn5ty9qt9w4cxlsgzrqw752mh6fduqjgqs9chhgrqsqqql8kzk06z6