Call around and find out. Some do, some don't. But I've yet to see a managed care facility that allows smoking inside the facility or inside a resident's room. Outside only is where some facilities allow smoking. My folks ALF did allow smoking outside in designated areas where they provided those tall ashtray type things for cigarette disposal.
More thoughtful facilities will work something out, and those ones are at least making an effort to respect their residents' right to autonomy.
I would ask if they have smoking areas.
My dads board and care home allowed it outside.