Conferences in the medical or pharmaceutical sectors often attract lucrative sponsorship from pharmaceutical and medical equipment companies keen to promote their products and these events usually have valuable commercial exhibitions attached. The commercial sponsors will often host groups of their top clients in whichever specialist field and prepare a luxury programme for them. These groups can make up as much as 75% of the delegates attending a conference and there is competition between the companies to provide quality programmes for their delegates . high quality hotels within walking distance of the conference venue and up- market exclusive social functions. Large congresses also tend to feature pre-.