Video Screening
Display equipment
Large TV's of say 28 inch are satisfactory for audiences of up to 25 or so, large plasma or LCD screens are excellent for up to 60 or so. For larger audiences a projector and large screen will provide more impact and better results.
If desired several TV's can be linked together with antenna cable (RF cable). In this case a junction box with a 'booster' may improve the signal on subsidiary TV's.
Projector
Projectors should preferably have a brightness in excess of 1500 lumens for small venues and up to 4000 lumens or so, for a large venue. A bright projector i.e. one with a high lumens value, will means that you won't need to dim the lights so much during play of your video. Many pubs and bars already have a big screen and projector. Please consider this before you book your venue.
Large Screen
If you are using a projector you will require a large screen. You should match your projector with a suitable sized screen and have a larger screen for larger audiences. The Projector Point calculator tool for video screen size may help you choose the screen size for your projector.