while Logo Tournament does not allow photo images as part of the logo presented you could get a terrific photo of a disco ball to add to the wordmark I presented and use it for appropriate applications like website, print on paper, etc... keeping the wordmark on its own for etching on glassware, embroidery on clothing or other applications where the photo image doesn't work.
Looking at disco balls they are typically done in either squares or circles on a sphere in mirrored materials. Thus the reflective part of the image is essential to get the look you want. I can try again to capture this look with squares rather than circles - with smaller segments and with gradients to emulate the reflections. But if it is a realistic image of the ball that you really want then consider combining a photo image with your new wordmark logo for some applications. I believe there are photo sites similar to this site but for photo images.