Don't try this is Florida. Its a felony to audio tape somebody without permission (misdemeanor for first offense)
Fla. Stat. ch. 934.03: All parties must consent to the recording or the disclosure of the contents of any wire, oral or electronic communication in Florida. Recording or disclosing without the consent of all parties is a felony, unless the interception is a first offense committed without any illegal purpose, and not for commercial gain, or the communication is the radio portion of a cellular conversation. Such first offenses and the interception of cellular communications are misdemeanors. State v. News-Press Pub. Co., 338 So. 2d 1313 (1976), State v. Tsavaris, 394 So. 2d 418 (1981).
http://www.flsenate.gov/Statutes/ind...n%2003#0934.03