If you've been stopped for suspicion of DUI and the law enforcement officer is detaining you, that means you're not free to leave, and he's conducting or she's conducting a DUI investigation, you actually have a right, an option to refuse to take the field sobriety exercises. You also, if the officer's going to ask you any incriminating questions, they will read you your rights, at which point in time, you can say, "I no longer wish to speak with you," or "I want my attorney." Having an automatic right to speak with an attorney at that present moment, no you do not.