The bar is OK if you go to the toilet before you get there and try not to drink or eat for a couple of hours before. You could have just a couple of drinks and eat, then ski down to the centre of Borovets and use the toilets there or some blokes might use the facilities at Georges bar for a number 1.
It is quite a good setting in the middle of the woods.
As an aside we went to Georges on skidoos last year - that was a great trip. It was snowing and the hot chocolate & brandy when we got there was most welcome!