As a long-time Spider Robinson fan, I have to admit that as much as I liked the Callahan series, they struck me as somewhat implausible (did I make that word up?) *not* because of the talking dogs or time travel, but because of the patrons, who could toss about puns so rapidly. No one can really do that, I thought!

I stand corrected. I'd play too, but I haven't a punny bone in my body.