I enjoy going out partially dressed in bra, panties & panty hose taking pleasure in the comfort, warmth, and slight, emphasizing slight, sense of danger wearing them provides.

In particular I enjoy going to neighborhood bars wearing the above, and rubbing shoulders with friends and neighbors.
My problem arises when I run into old acquaintances that I haven't seen for a while. 
With women it's not a problem as either I'm not huggable, as if that were possible, or women are more adept at reading body language and sense my unease.
With men it's a different story, as often with virtually no warning I find myself embraced by male flesh pressing against my push-up bra, with their hands rubbing against the bra straps.
This unwelcome embrace has fed my paranoia, and produced a heightened sense of danger along with not a little embarrassment. 
I know I could just frequent places where I'm not known, but, somehow, that just isn't as enjoyable.
Has anyone else encountered this or similar problems, and how were they dealt with?
Secondly what's with all this man hugging?

Yes, as a discreet bra wearer, hugging can be a problem.

For me, it is made worse by the fact that I love to wear bras with lots of buckles and clasps which sit tight across my back. I get turned on when wearing a brassiere under a sheer, tight top with lots of strap features peeking through!

If I know I am going out to meet lots of friends, I don't wear a bra but then I do wobble a bit. But I love to hug the ladies and feel for their bra clasps. They know I do it and they like it. They think I am being sexy, but I am trying to find out how many hooks the clasp has and how tight they are fastened.

Random shoulder tapping is my problem. Women sometimes tap me on the shoulder, often is shopping queues, and right where my bra strap buckle lies. I am sure they suspect I am wearing a bra and they simply want to confirm it. If they then responded positively, it would be wonderful, but they generally don't.

Once a lady did say, "I see you need support", but then I was too shy to reply! Now I might try to engage her in a conversation about bra sizes, styles, fitting problems etc.     

I regularly get tapped on the shoulder or slapped on the back by men during conversations, but I very much doubt they are testing for bra straps. I don't suppose they know what a tight strap even feels like!

Anyway, I did not fancy any of the men who have ever hugged me in a bra to grope me or suck on my nipples. Whereas some of the women would have been very welcome guests.