Playing a single number could be practically the worst choice and a perfect no, in real casino environment. Unless one has patience to keep playing thousands of spins to conclude a game, it is not recommended.
For better understanding what can we get to see playing a single number by any parameters one can see the fate of #3 of zumma in http://betselection.cc/albalaha's-exclusive/albalaha's-open-challenge-can-anyone-beat-the-worst/
For better understanding what can we get to see playing a single number by any parameters one can see the fate of #3 of zumma in http://betselection.cc/albalaha's-exclusive/albalaha's-open-challenge-can-anyone-beat-the-worst/