Assorted #8
In Konohagakure, there are 3 types of Ninja. Clan, Civilian, and Civilian Clan Ninja.
Clan Ninjas are really rigid and have a lot of unspoken rules of propriety. They are extreme lightweights and can't drink coffee without Side Effects occurring. Typically (exceptions may apply) living with their families, they have very specific diets that won't cause any issues in the long run.
The Inuzuka Clan can't really eat vegetables. Shino nearly faints when he finds out that Kiba has never see lettuce because that's a huge staple of the Aburame Clan.
Civilian Ninja are 'rowdy' and 'rough'. They can generally eat everything safe for humans and live in either the civilian or ninja districts. They drink coffee, eat deep fried food, etc.. No Clan Ninjas can truly drink coffee or have whiskey, despite Kakashi desperate attempts when he was a chunin.
There are a few 'Civilian Clans' (Uzumaki, Lee, Sarutobi, Yamanaka) where they can eat normal food and drink coffee but they can't handle alcohol.
The exception to all these rules is the Akimichi Clan who can consume Anything with no side effects whatsoever. This includes rotten flesh, although they don't exactly like the flavours or taste.
P.S. I have Feelings about the Sarutobi Clan. None are really good.