public double opop(Bundle<Venue> bundle) {
		double opop = 0;
		
		List<Venue> bundleVenues = bundle.getItems();
		for (Venue bundleVenue : bundleVenues) {
			opop += opop(bundleVenue);
		}
		
		opop = (double) opop/bundle.getItemNb();
		
		return opop;
	}