I do most of my shopping in one store, or online.
On the rare occasion I wander into one of Belgium's biggest retailers, they're usually pseudo helpful, until they realise I'm not buying the same day. Then they just shrug me off. They've lost a couple of sales that way already...
I mean, really? You expect me to buy this 1500 euro amp on the spot, without checking out the alternatives??
Want to get good service in a guitar store? Walk in there with a Les Paul. That usually gets them groveling :?