Because he drinks inexpensive alcohol and avoids the theater, Mr. Utterson's enemies probably think he is
cheap
thrifty
tasteful
extravagant

Explanation:

Since they are his enemies, it should be a pejorative adjective; i.e. a demeaning, insulting word.

Tasteful and extravagant do not match. Tasteful is to have good taste, which is typical of a refined person, not one who drinks inexpensive alcohol. A tasteful person, who liked alcohol, would drink a good alcohol, which likely would be more expensive. And also, a tasteful person would enjoy theater.

A extravagant person does not refrain its expenses, thus it is opposite to the fact that Mr. Utterson's drinks inexpensive alcohol and avoids the theater.

Thrifty might be but it is not. Thrifty it is a positive adjective;thus, his enemies would probably prefer to use cheap, that means that he will try to not spend money, and that is why he buys inexpensive alcohol and avoids going to fancy places, like theater.

what was your story about? i remember this from my language arts class in flvs! i had ms. rosemeyer.