I never really used craigslist for hookups just here and there. However doublelist so far seems to be worthless. I hit up a few ads two nights in a row and didn’t get a swingle reply. I live in a big US city too.

...but don't mistake for double d list. That's a big tit site.

So far Doublelist ("DL") has been making
steady improvements on their site.
It's like Craigslist, but without the former
Craigslist ghetto-trash bullshit... the staff is
working round the clock to make sure no hustlers
and prostitutes try to post on Doublelist
since the shutdown of the former Craigslist
Personals section.

I've had a few ads up on DL since day one, and I've
been getting hits from guys of my type.
Whether they actually visit me, or suddenly have
"cold feet", any reply is better than No reply at all.

Doublelist is also adding new cities to their main
index page, so folks can find hookups in their
local regions.
If your city isn't listed, scroll to the bottom
of DL's page and click "Contact Us/Give us feedback"...
...in the next page click the link that reads
"Don't see your city? Click here!"...
...in the next page, type your email address,
name, and your City Location...
...complete the Captcha Code challenge...
and finally, click "Please add my city".
There, you're all set!

When the DL staff receive your City request, it will
be placed in the Que for the city listing.
The more often you send in your City request, it will
place your request higher up in the Que for priority.
Sooner or later, your city will be listed.

Check the city list daily to see of your city is listed.
If it's not listed Now, it will be listed soon.
Just keep checking.
In the meantime, browse or post your ad in the listed
city area that is Closest to you.

Hope this helps!

thanks