Key and Custom Fields Help

I am trying to write a custom function/key/field for a site I am building. The site will have different locations, each needs to display it’s own events. So for instance, we have location 1, I need a custom form that someone can first insert the data into the database for an event, and then another page where someone can search that specific location for events, it opens up into another page with the months events, then page 3 with specifics of the event chosen. I know this can be done through the key/custom field area, and have successfully created custom fields, and had them display through single.php.
But I need to make it work for several locations.