How Do You Gauge What to Wear to an Interview?

Dear Experts, What are some tips you give on what to wear to an interview? I just went in for an interview for a intern position with a guerrilla marketing company in a suit and tie and the interviewer told me it was the first time they had ever had someone where a suit to interview for their company. I felt embarrassed, as if I was over dressed. Any help on this issue would be greatly appreciated. Here is how our CAREEREALISM-Approved Experts answered this question on Twitter:Q#371 I vote for overdressing - suit is mark of respect. u could joke "guess I'm a higher class of intern!"(@juliaerickson) Q#371 Ditto comments from @DawnBugni: research, stake out, step it up a notch (or 2). Right on. (@CareerBranches) Q#371 I always wear a suit/shirt and tie to an interview. Far better to be overdressed than underdressed. (@gradversity) Q#371 Research. If U can, watch emp going to/from wk for a day or 2. Dress 1-2 levels higher. Better over than under dressed. (@DawnBugni) Q#371 U don't have the job yet and need 2 impress. A suit is appropriate interview attire. (@DebraWheatman) Our Twitter Advice Project (T.A.P.) is no longer an active campaign. To find an answer to the above question, please use the "Search" box in the right-hand column of this website.