Ok Pamporovo is a great place to learn and I love it, but I would go to Bansko. Pamporovo is purpose built where as Bansko is a town in it's own right with loads of proper traditional restaurants and a good choice of lively bars. Plus in Bansko if you know where to go(just ask) you can still eat and drink incredibly cheaply.
Cheapest is....... Bistro Pirin look toward town from the gondola walk down pass the crossroad and it is about 100 metres on the right opposite the car park. Does not look much but if you are after cheap tasty hot and very good local food you cannot go wrong.