The Room Monkey's moved out. We are seeing substantial savings . . .
so just kick your kids out. 
But also . . .
We just sold my DD ('00 3 Series) since I seldom used it. Big savings there. I therefore had to switch my 911s insurance since my old car insurance was dependent on a DD. I broadened it (the allowed usage part) but it did zing to $1300. I can now use it as a DD for about 7 months of the year.
We seldom go out by choice. I cook. All of my business travel expenses are covered & the loyalty miles earned really offsets vacation costs with free air & some hotels.
My only $ vices are the 911 & collecting/drinking wine.
Ian