Hey there Tim, I believe a 3.5 × 7 foot pool table will certainly "fit" but you'll need to utilize inch cue sticks for most of the shots. You may be able to make use of a common size hint along the open side of the area. It's not perfect but are you truly going to be organizing Billiards Tournaments? What dimension area you need for a swimming pool table is identified by the size of the table itself and the size of the pool cues you'll be utilizing.