Can you please show me some pics of your DIY rec rooms including bars, bathrooms and living area?
Here is a link to ours. Has been posted several times in the past so you may have seen.
A bit of imagination is necessary as provisions for a pool table are designed in to the layout though we don't have one. If you study the posted layout diagram it shows the space. Same with the bathroom as I have yet to cut the floor to install the plumbing but the space is reserved.
Ours was entirely DIY, in phases, over the course of several winters. Many of the photographs have information below the picture giving some explanation about the installation.
Hope this helps.
Here is a link that might be useful: Basement Photos