'As well' I've yet to see but I seem to fight a losing battle to keep 'all right' rather than 'alright'. Maybe it doesn't much matter.
In fact where I live 'Awright?' seems to be the greeting of choice. The response is, of course 'Awright?'.
Should someone be offered, for example, a cup of tea and not want one all too often the response is 'I'm all right' instead of 'No thank you'.
Recently I find myself spelling out double letters 'ess, ess'instead of saying 'double s' as I've often had people on the phone mistake w for any double letter and spell a word back to me as, for instance 'a,w,se,w,s' for assess.