Can't really help much on this. Had a meal in a pub in Prestatyn a few years ago. Can't remember the name of it - it was next to a largish car park. The food was poor and the clientele was rough. A less than average pub in a grotty town !!
Rhyl wasn't much better. The Wetherspoons - http://www.pubsgalore.co.uk/pubs/57061/ - was bog standard with few redeeming features but at least you know what to expect from one !!
I would go back for a pub crawl - but I would drink anywhere !!