Sugar & Spice, a strip club in Norwich, counts surgeons and judges among its customers. The business, co-owned by Daz Crawford, an actor and former athlete in the television game-show “Gladiators”, is fighting not only for respectability but survival. Like most nightlife spots in Britain, it suffers from declining footfall. It also faces challenges unique to its category. The number of licensed clubs, formally known as sexual entertainment venues (SEVs), in England and Wales has dropped from around 350 in the early 2000s to some 150 today. Although stigma and changing consumer habits, including the rise of online pornography, have not helped, local restrictions have accelerated the retreat.