"Getting drunk and playing darts isn't something exclusive to the lower classes." Sure, Lambert might not enjoy some of the more upper class aspects of Strange's social group...but it's getting drunk. There's nothing fancy about getting drunk.

"Besides, when we return to England, you won't be able to do your usual skulking about and ignoring people. Depending on where Norrell and I are, you might be the greatest authority on magic in the country. Ministers and Parliament will be banging down your door. Lambert and yourself will have to deal with titles and ranks of note."