I was in Ghent about two years ago, going to watch the football, there was a big group of lads and lots of beer so I'd imagine it would be a similar to a stag.
There was plenty of drinking done, I personally attempted to try one of everything on the menu, I think I only stopped for the game itself. And I was surprisingly hang-over free, although there was few "scenes deleted" from the latter part of the evening. The kriek seemed to be a big hit with the normal Bud/Heineken crowd.
There was also a fair bit o' culture there too, cathedrals and canals seemed to be what Ghent is all about.
And if you see Domernack Foley or George Leekens there tell them I said they're a pair of wankers.