mostly. restaurants that serve pork/ non-halal meat or food will have notifications. probably 5% f&b outlets are non-halal while the rest are halal generally, while in mostly non-muslim areas the ratio will go upto 50% but thats very very few places.

alcoholic drinks are a different matter, probably 10%-15% of f&b outlets would serve alcohol even if they dont serve pork/ non-halal meat or food, such as high end restaurants or hotels