From Chapter 2:
But the apothecaries were the most usual salesmen, and their shops and the ordinaries were the customary day meeting-places for the more fashionable smokers. The taverns and inns, however, were also filled with smoke, and taverns were frequented by men of all social grades. Dekker speaks of the gallant leaving the tavern at night when "the spirit of wine and tobacco walkes" in his train. On the occasion of the accession of James I, 1603, when London was given up to rejoicing and revelry, we are told that "tobacconists [i.e. smokers] filled up whole Tavernes."

From Chapter 5:
The year 1660 that restored Charles II to his throne, restored a gaiety and brightness, not to say frivolity of tone, that had long been absent from English life. The following song in praise of tobacco, taken from a collection which was printed in 1660, is touched with the spirit of the time; though it is really founded on, and to no small extent taken from, some verses in praise of tobacco written by Samuel Rowlands in his "Knave of Clubs," 1611:

To feed on flesh is gluttony,
It maketh men fat like swine;
But is not he a frugal man
That on a leaf can dine?
He needs no linnen for to foul
His fingers' ends to wipe,
That has his kitchin in a box,
And roast meat in a pipe.
The cause wherefore few rich men's sons
Prove disputants in schools,
Is that their fathers fed on flesh,
And they begat fat fools.
This fulsome feeding cloggs the brain
And doth the stomach choak
But he's a brave spark that can dine
With one light dish of smoak.

There is nothing to show that King Charles smoked, nor what his personal attitude towards tobacco may have been.