In Jane Austen's Persuasion, slightly after Anne first arrives at Camden Place (where her father and sister have moved to), Lady Russell comes to pay a visit as well, where she has to deal with people being treated differently than she would like. We are given this passage on the matter:
Lady Russell's composed mind and polite manners were put to some trial on this point, in her intercourse in Camden Place. The sight of Mrs. Clay in such favour, and of Anne so overlooked, was a perpetual provocation to her there; and vexed her as much when she was away, as a person in Bath who drinks the water, gets all the new publications, and has a very large acquaintance, has time to be vexed.
Persuasion, chapter 16
I'm not entirely sure what "as a person [...] who drinks the water" is supposed to mean. Is this a play on words with the name of the city of Bath? Is this a reference to a certain type of societal company? What does it have to do with having "time to be vexed"?
What does this phrase about "drinks the water" mean?