"Ask" is a transitive verb that takes a direct object which is "me" in this example. I suppose that it may not be incorrect to say "to me" because that could be a prepositional phrase functioning as an adverb BUT this sounds very awkward to this native speaker of English and it's not something that I would ever say. Sometimes you just have to accept that this is how English is. ""People" is the plural of "person". In this example this is the word that you should use because you are talking about a room full of persons. "People"may also be used to describe an ethnic or religious group in which case the plural "peoples" may be used to describe two or more ethnic or religious groups. So you could say that a room is full of "peoples" but that would mean that it's full of American people, and Chinese people, and French people, and all kinds of people.

”ask“ is a Transitive verb. It doesn't require an extra preposition. "People" carries the idea of "a lot of", there no "s" is required.

1. With almost all English verbs, you do not need to use the word "to" before the object. A couple common verbs you must use "to" with are "to give" (I gave it TO him...) and "to say" (I said TO him...) ". But otherwise, you don't. "To ask" is not one of those verbs. This is just something you'll have to memorize, but the good news is that there are only a few verbs where it applies. 2. "People" is already the plural of "person." It is just one of those irregular plurals that does not end with an "-s", just like "women," the plural of woman, and "men", the plural of "man." One person --> two or more people One woman --> two or more women One man --> two or more men In some formal writing, you might hear "peoples" to refer to people GROUPS, like "the peoples of the earth". But this is very uncommon (the only place I can think of where I've seen this is in religious writings).