The venue for an event should be chosen based on what sort of an event it is and any associated themes. The venue could be anything you like, whether it's a loft, a flat, a hall, or a room.
Although it doesn't occur to most people, it is possible to hold your own wedding without spending too much money. To start, you need to choose your own venue - one that doesn't come with all sorts of obligatory services attached. After that, you can choose just the things that you need - catering, equipment, and programmes - without crazy surcharges and commissions. Not only will you save money - you won't have anybody dictating proper behaviour or conditions to you either.