What Did He Mean by "Contemplating" ?

...
Ten years ago, during my last trip to New Orleans, my travel companion, Donna, was napping so I ventured out for a walk. It was mid to late afternoon, a pleasant day, and I was on one of the less-travelled streets of the Quarter when I said hello to a man about the age I am now, sitting somewhat propped up on his stoop. He looked at me and said in a raspy, weathered voice, "I'm contemplating a gin and tonic."

I mean, was he contemplating a certain one?
That one too many of the previous night that caused a slow day that day?
Was it an euphemism? An invitation?
Was, as I imagined at the time, he contemplating having one then? Thus more the idea of some mythical future gin and tonic and not a specific one....
All of the above?

For the record, I'm not contemplating a gin and tonic right now, I'm contemplating contemplating.

Cheers!
,m