You may all know of this site but I thought I'd post a link...

http://www.dive-centers.net/

Seems to have info all loads of countries and dive schools, so when you are planning your next holiday (have a sneaky look without the wife/partner knowing) and book your holiday next door to a dive centre..

When you get there a response of "What a coincidence, look love there is a dive centre next door to the hotel"