I am very confused. I want to do an MBA in the US but I am not sure which one I should select. I have not applied yet but I have looked at the following business schools:

University of Florida
Wake Forest
University of Wisconsin
Purdue University

I am from an Asian country and I have worked in hospitality for around 3 years. My degree is in hospitality management. After the MBA, I aim to work in the US and eventually become a permanent resident. I do not know what industry I will work in, but I am considering staying in hospitality or going into financial services. I got 660 on the GMAT.

Take a look at:-
How to use LinkedIn to find the best school www.find-mba.com/board/33571
and
Shortcut to find the best US MBA www.find-mba.com/board/36065

If I were you I would narrow my career goals and make your selection based on that. These are really a wide range of business schools, and as far as I know none of these are really reknowned for their placements in either hospitality or financial services.

In general though, Krannert is probably the best of the bunch, followed by Wisconsin.

Maybe have a read through these links:
http://find-mba.com/lists/top-business-school-by-speciality/top-business-schools-for-a-career-in-tourism-hospitality-leisure
http://find-mba.com/lists/top-business-school-by-speciality/top-business-schools-for-a-career-in-finance-or-financial-services

... so if you wanted to continue down the hospitality path, perhaps something like Broad or George Washington would be a good choice.

Do you think that I would be competitive at Broad or George Washington with a 660 GMAT score and 3 years of work experience?

Did you take a look at the post I suggested? http://board.find-mba.com/usa/shortcut-to-find-the-best-us-mba-30765 Since you are below the average work experience, and only slightly above the average GMAT, you are not an especially strong candidate there.

Thanks for the insight. I will attempt the GMAT again.