We built a custom image processing pipeline for Sitecore, to allow content editors to apply sophisticated Gaussian blur effects to album images. This made the music sales section of the site really come alive.
The club sells tickets via the website. We provided a shopping basket and integrated it with the Realex payment system.
The most popular pages on the site are ones where you can listen to a variety of streamed music. We built a system that could integrate with their stream provider, and allowed them to manage both live DJ sets, as well as an archive of old shows.