Not sure about the dating bit but there’s a need in the market
For real life networking/dating parties or events that would get sex workers together (from escorts, to webcammers, actors, BDSM etc… Any entrepreneurs out there? 

I guess there is also a numbers issue; most escorts are women, and most women are either totally straight to straight leaning. I wouldn't be surprised at all if a larger percentage of escort are bisexual, than the broader population but its still finding a niche of people within a niche, before you get to all the other general compatibility stuff. And straight/straight-leaning male escort/sex workers aren't really a thing, other than a few wannabes and posers here and there.

I totally get you though,  after lots of dating issues relating to my profession, I've often thought, wouldn't it be nice to date/build a relationship with another escort theoretically at least.

You could try set up a WhatsApp group or something similar for bi/lesbian escorts open to dating, which might make the 'niche in a niche' thing less of a problem because something digital is less location restrictive.

I wouldn't be surprised at all if a larger percentage of escort are bisexual, than the broader population

Definitely.

And straight/straight-leaning male escort/sex workers aren't really a thing

One of the things that happened twenty or so years ago was that the proportion of male escorts with a straight identity greatly increased. The project I'm most familiar with went from 0% straight to 9% straight in terms of its clients. They were doing men, but it was definitely a 'gay for pay' situation, taking advantage of the gay scene's fetish. The bisexual-identified numbers also shot up.

In Sydney, another project found over half of its male escorts had a straight or bi 'private' identity. All of them had male clients (just under 10% had female ones too).

Definitely.

One of the things that happened twenty or so years ago was that the proportion of male escorts with a straight identity greatly increased. The project I'm most familiar with went from 0% straight to 9% straight in terms of its clients. They were doing men, but it was definitely a 'gay for pay' situation, taking advantage of the gay scene's fetish. The bisexual-identified numbers also shot up.

In Sydney, another project found over half of its male escorts had a straight or bi 'private' identity. All of them had male clients (just under 10% had female ones too).

Thats interesting, yea I didn't think about gay for pay guys tbh when I was typing the above. I did once date a guy who identified as straight when I met him, then took an interest in the business through me, started trying to get female clients, and struggled (other than a few mmd/cuckold situations), so went the gfp route then began identifying as bisexual and after we stopped seeing each other started mainly seeing men I think. I suppose the internet has opened doors that in the past people wouldn't have considered opening or 'for them'.