I don’t see a way to link two artists joined with a join phrase to an event. Also, the setlist @ syntax doesn’t seem to support that, because @ must be the first character in a line (so writing @Beth Gibbons & @Rustin Man won’t work as expected).
Agree that needs a better credit. You often get one off “super group” line-ups at event where different people perform together. It isn’t just this kind of pairing that is lacking for coverage in Events.
For now all you can do is list them as separate artists, but I would also go to their recordings and link the event in on each recording.
I don’t use events much as they feel a little too much as an “in development” idea - but when I do it is as a Recording relationship.
I think at some point in the future, Musicbrainz will have a “Set” entity in the schema (perhaps with a name other than “set”) So you would be able to say that Event X had an 8:00 Set with Artist Y and Artist Z performing together, a 9:00 Set with Artist Y alone, and a 10:00 Set with Artist Z alone. Right now, the only way to do this is with the setlist, which seems kinda sub-optimal.
The challenge around this kind of “set” idea is to create a not-excessively-complicated editing-UI for it.
I am also struggling with this sometimes. I brought it up in the Event guidelines post, and @UltimateRiff correctly pointed out that the setlist gives us some options to overcome this. .
Still I think this is less than ideal. For example when you don’t know the order in which artists played at a festival, but you do know which artists played a set together, and you store this fact somewhere. I wouldn’t put the artists together on the setlist, as was suggested, because I feel like the order in which I put the artists would imply the order in which they played, which I am completely unaware of.
A system where we could connect performers with join phrases would create a lot more options and would look better imo.