I was thinking and I wondered why not add a gallery of images for each band?

I think it would be a good idea, could help with the biography of a band and could explain some events. It would also be great for wasting time and bring something to the page

Multiple images for band pages, perhaps including editable captions for each, have been proposed in the past. It would certainly be a cool feature.

Yes!

So that there isn't any misunderstanding here, it was proposed and supported by many moderators, but if or when it's actually going to be implemented is far from certain. Something for the mid-to-relatively-distant future, I reckon.

maybe with some kind of jquery library that enables the viewer to switch the images with the arrow keys.