You will find it less stressful as a presenter to be working in familiar surroundings. Your audience can't quite get away from their every day working environment, and it's difficult to stop them from popping out for important phone calls or being late from breaks. C heck the quality of the slide projector and overhead projector if you are using them. Make sure that the lenses are clean and that there are spare bulbs available. A void external distractions, particularly noise.
Nothing is worse for audience concentration than physical discomfort.
Of course, if they are too comfortable and the room is hot and stuffy, your audience will be inclined to fall asleep. T he general facilities and services of a venue should reflect the values of your company. Your next step is to choose the appropriate means of creating the supporting visuals and the most appropriate medium for their display. Visuals help to explain things and ideas. A chart or diagram can often explain a complex concept more easily than words.