Square dance square dance, very rarely are two modern Western dances ever alike. Like traditional square dancing, recovering from occasional mistakes is often part of the fun. Dancers are encouraged to dance only those programs at which they are reasonably proficient, the default level of achievement being the Mainstream program. All programs are set by Callerlab, the callers' international association, which also governs the training of callers. Irish and Scottish dances are normally done to traditional tunes. English dances may be done to traditional tunes, though, especially at ceilidhs, there is experimentation with many different musical styles. The two types of American
Activity centre urban locations, commercial buildings often combine multiple functions, such as offices on the upper levels with retailing on ground levels. The purpose of activity centres, or neo-traditional development such as urban villages or compact cities are to provide a mixed use core, within walking distance for most residents. Employment centres are incorporated into these types of areas, so that residents have the opportunity to both live and work within the centre. Activity centre policies in most countries provide guidance for local and state agencies as well as the development industry as to the preferred locations for these commercial land uses.