I understand that most of the people who come to the rat-hole clinic I work in would rather be somewhere else.  I can't really blame them because the atmosphere in that place really sucks.  Almost non-functioning air conditioning, brusque staff members and perhaps worst of all, a cold as fish, almost asshole-ish  male examining physician.  Me.
I don't do friendly.  We see around 40-60 pre-employment patient-clients daily, not counting the10-20 actual medical consults we get, and add to that the medical certificates we have to sign for the employees of a crappy motel chain here in Manila.  With that amount of toxic,  I  am in no mood to exchange pleasantries with pre-emps.  ( I am nice to consults though.  They have real problems.)  My philosophy regarding pre-emp clients is this:  I'm not going to waste your time, Sir/ Ma'am, let's do this fast so you can get back to what you need to do.  With the oppressive atmosphere of the place, I think I'm actually doing them a service.  Hehehe.
While not friendly, I am at least civil and polite to them and for some, I can be quite nice (read: some pre-emps are pretty girls).  Pleasantries will delay or prolong the physical exam and make the other people 's stay in that rat-hole place longer.  So I have to dispense with the nicey-nicey and the chit-chat. 
There are some people though who seem to be immune to the soul-destroying, life-sucking ambiance of  the clinic.  One of them is my co-worker GP Dra. J, who seems to hold it together better than I do.  God bless her, I think it's because she's married.  (Maybe I should get married na din.)  Another is this guy who was there for a pre-employment physical exam.  I was asking him his medical history.  The conversation happened in Tagalog. 
Me:  Have you ever been hospitalized in your whole life?
Dude:  Yes, doctor. 
Me:  When was that, sir?
Dude:  When I was born.  Hehehehe, joke lang po. 
Hrrr.
I gave him a lame laugh and mentally gave him the finger. 
I hate comedians.