The only Burger joint I'm interested in is Three Brothers in Bristol. Its a little pricey, but it's badass, and the place is on a MFing BOAT on the canal. They have the best selection of beers and ciders.
A couple of years ago, we arrived late in to Bristol after delayed flights and trains. The place was supposed to close at half 10. We arrived at 10 and they said no problem. They were letting people in for food until near midnight. Food stopped at 12 but folk could come in for beers after that. Then we sat out on the deck of the boat and drank all of the cider until 2am, whilst watching the mad thunder that delayed our flight. They close when the party is over.
3 Bros aside, I'd rather make my own burgers, or go elsewhere. Most burger joints are weird and try too hard to deliver a gimmick nobody wants, and the burgers are often bang average at best.
If you're ever in Bristol, go to 3 Brothers. And invite me.