All the rooms are non smoking. Dont worry just book your rooms and trust me you will be happy with their service.
The whole place appeared smokeless to us. I don't recall any odours of smoke... BTW, there are no communal areas at the property: no bar, lounge, garden. It's compact and clean though.
We are non smokers had had no complaints
As a non-smoker I know how important your question is. I think all rooms are non-smoking. Certainly the one we had was and it didn't smell as if anyone had smoked in there which either means the whole hotel is smoke free or they're good at clearing the air.
Get an answer from Hotel 233 Park Street staff and past guests.