As far as a court of law is concerned, you are really charging since there is the obvious expectation of getting something of value in exchange for the moviegoing experience. In any case, you cannot just buy a DVD and think that you have exhibition rights; every DVD contains a warning against ANY public exhibition, and that includes freebies. The copyright and license owners of any title are the ONLY ones that can give you permission, and you had better be sure that you get WRITTEN permission from the person who has the legal authority to give you that, else you will be up the proverbial creek. Do not imagine that you can convince a court that all attending are just your 'extended family'; they will see through that and likely put you in jail along with a huge fine as well as damages to the title's owner! Contact the Copyright Clearance Office of the Library of Congress (
www.loc.gov) about any title and they will tell you how to proceed.
Don't expect to make any money on this endeavor without paying hundreds of dollars in fees, if the owners/distributors will even grant you any titles at all. If you know an Indie producer personally, maybe he will slip you a print, but count on a lawsuit if any competitor gets wind of what you are doing!