sometimes you can get multiple sub domains to rank for keywords. they might not all be in a row on the first page, or they might. You most likely won't get multiple pages of the same site to rank for a given keyword.
And as long as you adjust out your title tags, H1 tags and some content, it's a good way to broaden your reach.
search: denver hookup
we have #1,3 and 19 - 3 different domains. Just a simple example.
or search hookup.com and we have about 6 of the top 10 and about 16 of the top 22. there are lots of other sites that have something-hookup.com.