Can you recommend a language school?

My wife and I both speak Spanish but as mine is better and I'm a typical chap, I kind of do all the talking. For Annie to get some practice without me hogging the conversation, she wants to stay for a week or so in July without me and attend a language school in Granada or Malaga, probably the former. Does anybody have any recommendations? She is at an intemediate-to-good level but needs practice and confidence, and she'd like a bit of fun outside classes but doesn't really want to be surrounded by kids or retired people (she's in her late forties, but rarely acts it). Objective opinions would be welcome.

Another more general question; is there a professional association of Spanish language schools in Spain that imposes standards? Should we be looking for a school that's a member of such an organisation?