There used to be one at the Alpha hotel, but I'm not sure if it is there any more. It wasn't too good anyway. You're better off in Bern, there are 2 or 3 that are mentioned in several threads here. The only one of which I have been to is downstairs in the Markthalle, and is pretty much acceptable. It's a bit "Swiss spicy" though, ie not very.
It's a shame really, there's loads of Tamils in Fribourg, but most of them drive taxis