One of the country's most prominent pub landlords has slammed the NSW government's pub lockout laws, saying they have completely destroyed the culture of Kings Cross and destroyed Sydney as a realistic and desirable choice for overseas tourism.

There has been an 85 per cent drop in patronage of venues at the Cross since the introduction, almost two years ago, of laws which locked patrons out of venues from 1.30am there and in the CBD, hotelier Bruce Solomon said.

The laws came about after a public outcry over alcohol-fuelled violence levels following the death from single punches of Daniel Christie and Thomas Kelly. Violence had dropped 40 per cent in Kings Cross since their introduction, Mr Solomon said.