Which backdrop is used?
in The Commons
https://www.daz3d.com/vintage-guitar-and-amp
Does anyone recognise the backdrop (wall and stage) from the first two pictures? I've searched the store for 'stage', but haven't had any luck so far...

Comments
Since the neon sign is basically the name of the PA, it might be a personal asset.
There's a couple indie bar type scenes at Renderosity that might meet your needs.
Thank you for your comments. The PA has released the guitarists and amplifiers, which can be seen in the second picture. Perhaps the drums, keyboard and backdrop will be released in a few days, too. One can only hope!
The drums are from this: https://www.daz3d.com/60s-band-equipment
Keyboard, too.
Thanky you! No hope then...
Honestly, that background is fairly simple.
Create a primitive plane and apply a brick shader.
For the curtain you need to find one, or model one, e.g. in blender, using cloth simulation. You might be able to do it in Daz Studio, but I think it would be more complicated (if possible).
For the floor you can use a plane, unless you want it curved and raised, which could be obtained with 2 cylinders, or easily modelled.
And if you want the sign, make a black and white image with the desired text, and add it to emission and cut-out oppacity.