hahaha, what a laugh! You will NEVER be negatively asserted on a sollicitation due to wearing a well trimmed and neat ringbeard. Anyone who says otherwise is just jaleous not to be able to wear one.
A full beard is other stuff, as this sometimes is seen as a way of "hiding" your face... But I say again, moustaches and ringbeards are totally kosher in terms of etiquette as long as you trim them nicely.
What you wear is more important, choose a black or navyblue suit, a white shirt and a red tie. Your shoes must be classic black, shining and the underside must also be clean.
Do not use too much perfume, that is a definte NO-NO.