I was thinking it might be interesting to hold the odd old-style tournament.
Use time limits from the pre-increment era, say 40/90 then 30/30 etc. You could even have adjournments as an option.
Young players would then have a taste of something quite different.
Games wouldn't need to be rated (which may not even be possible).
An option would be to have players record in English description (the norm before 1974), though probably not the first time its tried.