I have no other use the for the space but I completely undrestand...Ive been thinking of that the past couple of days...however, we do host a lot of social gatherings amongst our friends, and it would make the separation of men and women that always occurs easier to accommodate with two areas for us to gather (chicks in the living room and the guys in the bar/man cave)
and ive priced out the materials for the bar, and the actual bar itself will only cost me about 300 bucks to make...so if after two or three years im sick of the bar, I can just take it apart and put it the curb (or craigslist that biotch) - its not going to be drilled into the floor (it will be sturdy because of the L design and anchored into the wall into one place) so there wont be much work to take it down...
and my design for the room will be more of a "high end" man cave, with high table and chairs at the back of the room and two club chairs on the other side of the room, so it wont just be all about the actual bar...