The first live show for 36 years by Eric Clapton's blues/rock "power trio" may have attracted the attentions of the media, but it has had difficulty snaring anyone under 40; young people are conspicuous by their absence from the bars and foyers of the Royal Albert Hall. The atmosphere is less like a rock concert than a corporate hospitality tent at Wimbledon. Paunchy men in sports jackets clink ice in gin and tonics, and mumsy ladies fan themselves with pricey souvenir programmes. Presumably some of them were here the last time Cream played the Royal Albert Hall, squinting at the...