Plan a night out together: create an outing, invite friends, build a shared agenda of stops, and keep everyone in sync with a group chat. Find your outings on the Outings tab of the Friends screen (Settings → Manage Friends).

Not directly — outing invites go to your Drink$ friends (tap + in an outing, then Invite members). Invite someone to the app first, from Settings → Invite Friends or the Contacts tab in Manage Friends, and add them to the outing once you're friends.

If you created the outing, its ⋮ menu also has Share to send a link.