The one hall venue is not catching on, I am surprised. As a consumer one would figure that the one hall venue is by far much more advantages, no worries of interruptions regarding noise or wedding crashers. As a one hall venue all the regular and senior staff work for you the whole evening instead of taking care of possibly two or three other halls.
In a one hall venue anywhere you might go you will find your family and friends no strangers.
If you are looking for a venue consider whether you should share a venue with another bride and groom or should you expect to be the only bride and groom in the complex. Do not settle for a half or a third of the venue, demand the whole venue, be exclusive.
Privacy varies widely from place to place, as does the importance couples place on it. If you’re having a daytime event in a public spot, such as a park or botanical garden, be prepared for strangers to trek past your party. They may even smile, wave, and come by to offer their good wishes. If this is okay with you (the more the merrier!), go for the park. If not, opt for a lovely lawn on a private estate. Or hold the reception at a restaurant or gallery that will post a CLOSED FOR PRIVATE PARTY sign. Be sure to inquire about available security at your site to keep gate-crashers at bay.
In addition, don’t think that just because you’re indoors, you’re safe from uninvited guests. Banquet halls and hotels often hold more than one affair at a time. If there’ll be other events going on simultaneously in rooms close to yours, you may hear karaoke-loving guests singing their hearts out to the sounds of Madonna through the walls or meet them over the hot-air dryers in the bathroom. If this bothers you, try to schedule your wedding when there won’t be another one next door. If this is impossible, visit the site on a dual-party night and see how the sound carries and whether there really are any major people problems — before you make a decision.