9'x 4 1/2' is a tournament table. Pool halls normally have 4x8 and bars and stuff have coin operated ones 4x8, sometimes you will find smaller ones than 4x8 but they are normally plywood shit tables.

Also, try and avoid a table that has "super bumpers". Some mfg's are now making tables with some special bumpers that really bounce the ball off and it requires you to play a totally different way. Most tables you play on outside of home will have "dead" bumpers so it's best to play on something similar on a regular basis.

Lastly, try to get a table that uses real felt. I have played on some tables where it's covered in a synthetic type of cloth and it plays really fast. Putting english on the cue ball is very hard on this type of table too. You need the teeth of the felt for the ball to "grab".