It’s a hostess. Since "hostess" begins with a sounded "h", it takes the indefinite article "a".
It’s a hostess. When determining whether to use "a" or "an", the way you pronounce the following word, and not the spelling, shows you which article to choose. Since "hostess" begins with a sounded "h", it takes the indefinite article "a".
Being a hostess can be enjoyable.
Being an hostess can be enjoyable.
More examples:
I hate being a hostess.
Being a hostess include people skills and teamwork.
Follow the same convention with the noun host:
Typically, a host tries to make a good impression.
A partial list of words that also start with a sounded "h", and therefore take the indefinite article "a":