I could be wrong, but I think it's a different event. I remember a former colleague telling me he received an invitation to attend an Oktoberfest thingy in Croke Park a year or two ago and as he loves all things german he and his wife duly went along, with her wearing a Dirndl. I don't know, therefore, if it was a corporate thing in that case so. It seeme to be more an Irish-German thing, rather than some company cashing in on an Oktoberfest idea as a means to get suits and their clients in.
(I feel bad saying that as I often have to wear a suit too...)