You say you can take it, so I’ll take you at your word: You’re way off base, okay? But that’s got nothing to do with who should pay or dating etiquette…
Of course, I admit, there was sex involved but there was no mention of committment and they all knew I was fresh out of a divorce. She/they had fun, I had fun (I’m not just talking about the sex). I know, I can here all you ladies now screaming that since there was sex, it’s a whole different ballgame.
It seems as though you’re defensive about the sex. Are you thinking that the sex is/was a factor in why these women don’t/didn’t offer to reciprocate financially? Or made it too intimidating for you to bring it up?
Plus, I’m of the belief that all serious relationships (speaking strictly for me) should start out as friendship.
Who pays should be a non-issue because we’re friends.
Sure, friends socialise and split the tab, as a general rule - but one dinner and a night of sex doesn’t make you instantly ‘friends’ with someone, any more than it constitutes an instant serious relationship. And as far as I know, ‘friends first’ doesn’t imply sex within hours after meeting. Was it really clear that you were just interested in someone to pal around with, or an occasional, non-exclusive bed buddy?
They had/have no reason to think I wasn’t interested.
Especially since they called to ask me if we were going out again.
If she/they had no reason to think you weren’t interested, then why would she/they need to call to ask if you were going out again?
Here’s what it sounds like to me:
A first dinner date that ends up in bed. As you say, it was fun, and (they think) things went great. You make the ‘appropriate’ next day phone call. Then nothing for ‘a week or so’ - and that’s in ‘guy’ time, right…
And yet you say they had no reason to think you weren’t interested???
I’m sorry, but that’s not friendship, or even a budding friendship. To be frank, that’s not even satisfactory behaviour for a new bed buddy. It’s hit and run, as far as I can see - and if these women had to call you for round 2, how else could they see it?
But, now that I think about it, even if a serious relationship developed, and we’re both gainfully employed, why should that change anything?
Well, you’re right - it shouldn’t. And technically speaking, whether or not sex is involved shouldn’t dictate who pays for dinner either. I assume first time out was your invite, so fair enough. As for date 2: The new version of events leads me to believe that these women may have been sceptical of your intentions, or even if they’d ever see you again. This frame of mind does not usually induce generosity or equanimity. Or feelings of friendship.
But bottom line is: I don’t know why any of these women haven’t offered to reciprocate - I don’t know them. The real problem is, you have no idea either, and obviously, your ‘friendship’ hasn’t progressed to the point where you feel comfortable enough to discuss it with them. I’ll believe that you’re attractive and a good dancer, etc., but forgive me if I’m a little sceptical about the good listener bit…
BTW, being newly divorced isn’t the equivalent of a get out of jail free card. You say you’re back on the dating scene after a 17 year hiatus, so let me tell you what you’ve missed: There’s no shortage of newly divorced men who don’t want/aren’t ready for/ are incapable of a ‘heavy’ relationship. Does that mean you should expect to cover all the expenses for casual-newly-divorced-guy-style dates? I don’t know. If you’re really concerned about it, maybe it should be a topic of discussion before things get physically intimate - time permitting, of course 
Objectively speaking, if you’ve been able to meet multiple women you say you like, you can have fun with, and can find nothing to criticise except failure to pick up the check for the first couple of outings, I’d say you’ve been pretty lucky so far.
Too harsh or fair cop?