Don't do it.
I desparately wanted a pool table and when we build our home, I figured that with 1400 sq ft in the basement-there would be room.
But we have the typical long and narrow rec room.
Pool tables need a HUGE footprint and we would need to sacrifice a lot to get it in.
So, we eventually dropped it. Instead, we got 2 bedrooms (one a home office, the other a home gym), a full bathroom, a huge bar, a fireplace, a poker table, a pinball table, an arcade game, a sectional, a home entetainment system, and built in bookcases.
Glad we went the way we did.
Consider a foosball, airhockey, bubble hockey or other things. All of these need small footprints.
But, wedging in a pool table where it doesn't fit is a bad idea. Putting it up against a wall is an unbelievably bad idea...