NL is not what it used to be. Over the boarder, many of the street girls are gone, but definitely the bars where working girls are found are closed. Only Emiliano's still exists: It is small. Still, there are girls to be seen.
Suppsedly there is a place further away called "Boys Town", but I'm told it's not too good. Expensive andnot high quality. Also places closing.
But, one can be successful if you have an "in" with someone who has girls' number and FB, and you call them to your hotel directly. So, hard for a newbie to find anything worthwhile here now.
Most people will be happier flying elsewhere, but it's good enough for those who live close by.