i spent couple of nights in udon thani 2 years ago. i didnt try to find any cultural stuff from internet beforehand so we only spend the time walking around in the day, found one mall but that was about it
in the night they had a standard hooker street there and on another street they had bunch of foreign bars and we spent some time on a irish one. we tried to ask for a nightclub but only found a smaller one though it was pretty nicely decorated
it was a while back so i wouldnt know any directions but the centrum itself isnt that big so if you want to find something it shouldnt be difficult