K.P.
I feel your pain mama! We were at swim lessons the other day and another mom offered me a cup of coffee... yay! Then proceeded to "pick my brain" about her child's development (kid pshrink and now special ed admin so it's a double-whammy). Outstanding. Really? I just wanted to chat and watch our kids swim. Oh well.
Honestly, I have gotten to know my husband's friends' wives very well and we have a little group. We get together every-other-month as a group of women and we have an agreement... we don't talk "shop". We are all (except one) educators or work in that field and we agreed at our first dinner that work was "off limits" and it is wonderful! There are so many other things to talk about!
When I first moved to NY a couple of my sorority sisters were living in NYC and it was great! We went out every weekend- dancing, dinner, drinks... they didn't ask me for my clinical opinion b/c to them, I was their sorority sister, not a pshrink. They have all moved away and for a while I really missed that connection, mainly (I think) because I missed that version of "me".
The best advice I can give you is to clearly let people know that you are "off the clock". For me, I have told potential friends flat-out "be careful what you ask for" b/c I'm pretty good at "turning it off"- although I can spot a delayed child a mile away- but if you ask for my "clinical opinion"... you're going to get it, unfiltered! Most people don't realize that being a psychologist is NOT the same as writing an advice column! People ask me all the time whether or not I'm "analyzing" them... I usually launch into why the term "psychoanalysis" has nothing to do with my training or say "yes, do me a favor and draw a house-tree-and person. You'd be amazed by what that will tell me" and turn it into a party trick.
Things I've said to get the message across:
"I'm off the clock, but would be happy to charge you an hourly"
"I only work with people under 5' tall" (in your case, and behind bars?)
"I'm in mom mode right now, but would be happy to give you the name of someone in the community if you would like"- this one stops it pretty fast!