The lighting is getting there now. It might be a good idea to build a "private room" it doesn't have to be big just enough for a table (every club needs one ) As far as the wall goes it should be simple to just use the lasso tool and draw an irregular line down the face of the cliff (on either side of the building) and then clear the selection. You'll probably have to blend some texture under the wall layer where you clear it. Keep up the good work