Add the Opening Act feature
Some concerts that ain't Festivals have an opening act by other(s) band(s), would be great if we could link or create an opening act for the concert.
Penny Lane commented
On a setlist page for a specific show, you could link to other shows that occurred in that venue on that day. We could then click those links to go directly to the setlist page for each opener (or whoever else was on the bill, not necessarily an "opener")
If you add another concert at the same day and venue without checking the festival tick, the automagically get linked (see related events on the upper right of the concert page).
So this feature is already implemented and there is not even the need to create the link manually.