Over half the book is Jake and co. going out to get drinks, or at least it seems that way at least. At a bar Jake sees Brett come in surrounded by a crowd of guys who are identified as homosexuals. This makes Jake feel disgusted, so he leaves and goes to another bar to get yet another drink but then leaves because that drink was not as good and goes back to the original bar to drink more after setting himself against those other men because he is such a big boi macho man. Yes that was a long sentence but it describes Jake pretty well, showing that he is homophobic (majorly so) and that he obviously likes to drink a lot. If these aren't just two of the most endearing traits ever am I right? (This is sarcasm, don't take this the wrong way.)
In the beginning of the second book we meet Bill and Mike and both of them are also heavy drinkers. Also they kinda talk weirdly, I'm not sure how to describe that part but whatever it is it is sort of annoying. The count from earlier in the book is apparently good at finding the best wine, so even though he was sent by Brett mainly to get out of the house he is obviously similar to Bill and Mike (as in a heavy drinker, kinda does whatever, and isn't a major character). Going back to Bill, he spent several days in Vienna (I think?) and barely remembers any of it since he drank so much. Also he's racist (although maybe he wasn't considered that at the time because of the year? Still that doesn't change the fact).
Pretty much the only character who I don't dislike is Brett because she causes many amusing things to happen so she is a lot of fun. That is true even though she is also no angel (an understatement at best).