I know of a few, but am interested in any guys here utilize other sites to book a session.  Thanks in advance & pm me if you prefer.  

That's a very interesting question because back before the internet I used to look through the pages of magazines like DDI (Domination Directory International) and a few others the names of which I can't remember. I met a few incredibly interesting women through those magazines. When the internet came along I thought, wow this will be taking things to a whole new level.  Surprisingly enough, 20 or more years later, it hasn't materialized. If there is a goto site, I haven't found it yet. Backpages before it shut down seemed to be the best you could find and that's not saying much.

I am trying to be more involved there, and I think it could be a pretty decent place. Interesting discussions in the forums, and reviews too, but it seems to be pretty sparsely populated.  

I used to be a regular contributor there back in the day when it was interesting. Lots of lively discussions and interesting characters.  

Yep, I am advertising on Dickie Virgin, but I wonder how many people visit there?  

I've been to a number of parties I found on Fetlife, but haven't booked any pro dommes from there.  

Dickievirgen, (lots of traffic from there and always bp, still.)
I am on several only mistress/bdsm/fetish sites and if you are looking for places to get your name out just basically check out my links on my site almost every single one you send in your info, and after they verify your profession, they list you.
All of them have sent biz my way, but really, the best for those serious boys looking to get bent by a strong chick, dickievirgen & bp. (of course, bp you gotta weed through a lot.)

BP is still on and poppin'- Sugar, I have been using the w4m & m4w since the day after, still business.
I just make sure to put keywords in your ad if you use it so the subs can just use the search at top.
The only difference is folks are getting more demanding when contacting- but that just makes it easier to weed folks out.

have vanished.  Has society changed?  I have noted that even the BDSM Porn has gone soft.  Being spanked with a limp noodle seems to be a big deal.  I have no idea what happened.

Nah, they are just very on the under. Heavy play still exists- it's just not mass marketed.
Individual sites, made to order vids & clips, stuff like that is where the real deal seems to be surfacing more.
But yeah- it seems like those not in the know seem to equate d/s into more of a fuck w/a fashion show, or base titillation, which translates into a lot of porn nowadays, and unfortunately the clientele. (real....fucking...annoying)

Not my gig for sure...

I have not been around for awhile, but I did not see anything mentioned that is new news.  I appreciate all the great suggestions.  I thought maybe I would see something new it appears nada has really changed in the BDSM community.

If you use the right keywords along side of kik, you can find quite a few takers...

I have the opposite problem. I am a professional submissive and everything seems to be marketed for professional dommes. Need to figure out where a sub can market herself lol. I'm one of the few in the Carolinas.

Dickie Virgin
Eros
Tinos Domina guide
Pandemos
Open adult directory
the list goes on...