Pay a visit to Blackpool. Experience the delights of the Thai Golden Triangle (part bulldozed), Central Drive (twinned with Beiruit), Dickson Road (AKA Damnation Alley)......you'll soon learn it's survival, not snobbery
You forgot Cookson St, the creme de le creme

I don't punt much in Blackpool and there are lots of areas that i'd not wander around late at night or indeed much after dark this time of year.
The same is also true however of most places and let's face it a lot of girls are located in the shitty parts of town.
Around 50% of my punts over the last 2 years have been in the blocks on New Hall Lane in Preston but i'd not punt there after dark either, as for further down that road near the other end I had an early afternoon punt about 6 or 7 years ago and had to sit in my car for 20 or 30 minutes waiting for the text to come up, I felt really uncomfortable as there was clearly drug dealing being done right out in the open and then an unconnected altercation broke out between 2 guys coming out of a convenience store
Like others I tend to get a postcode and then take a look on Google street view, i've been sent postcodes around Manchester and half the windows were boarded up, I didn't book.
Also avoid areas where there are only 1 or 2 cars parked in the street as they're basically run down shitholes and your car will stand out like a sore thumb.