What can be provided to LAN users besides the exchange of information?

Question

Computer networks

There is a LAN, no Internet access. People work with different documents, sometimes they get together to discuss various issues.
What can be introduced into their work so that it is necessarily connected with working on the network?
For example: chat, video calls, events and reminders. What else can you think of?

Answer 1

Ask them, observe what they lack.
But they want internet :)

Answer 2

raise bigbluebutton for them so that they don’t get together)))
raise a local jabber server
as an option for file synchronization, you can raise syncthing
, you can raise VOIP
Zimbra, Zarafa ....
In general, a LAN without Internet access is a dubious idea .... Not in the army, is it a case of a LAN? Then put a counter if the computers are weak, you can Duke Nukem or QUAKE 3 Arena