In the UK, pub crawls are generally spontaneous nights out in which the participants arrange to meet somewhere and decide over drinks where to drink next. Structured routes with regular stops are rare. Most drinking sessions based around a special occasion such as a birthday or a leaving celebration will involve a pub crawl, often with the group splitting up but agreeing on meeting at the next location. It is a common sight in UK towns to see several groups orbiting the various drinking locations with little apparent coherence or structure.