In other words... suck it up! Almost every major place has bloggers who are obsessed with what's new and great in their own place or their favorite places, particularly in regard to where to go and what to eat.
Just search Google to find bloggers in wherever you intend to visit. They're a phenomenal resource so don't just read what they're writing, comment and ask questions or better yet contact them for personal recommendations.
The more specific your request — and the more you flatter them for their insight and wit — the more likely you'll be to pique their interest and get a response. However, just make sure that you read their articles first before asking questions because it is a bit annoying to ask questions that are already specified in the article itself.