I'm vaguely familiar with Hazel (thru reruns). I'm 53. I think the demographic for this show would be fairly limited. At best, it is viable possibility for off-Broadway. Although the character is lovable and endearing, I feel that Hazel's commercial prospects are questionable if you're talking about a Broadway run.
"Noel [Coward] and I were in Paris once. Adjoining rooms, of course. One night, I felt mischievous, so I knocked on Noel's door, and he asked, 'Who is it?' I lowered my voice and said 'Hotel detective. Have you got a gentleman in your room?' He answered, 'Just a minute, I'll ask him.'" (Beatrice Lillie)