Things are different now, I suppose, but "back in the day" house bands were the thing, at least here. I played in several scenarios where we played in the same place, 6 nights a week, for years at a time. That all changes after MADD got going and got laws changed.
To me venues that can't afford to pay bands a decent amount of money don't need to try to have bands. It's no different than if they can't afford to pay their liquor or beer distributor, or for electricity to keep the doors open. Just because a venue "just don't make the money" to afford a band doesn't mean that musicians should play for chump change, in my opinion. Why is it up to the band to payroll a bar's bottom line? Does the beer supplier give them a break on the price of Bud Light? If a band doesn't value their talent then for d@mn sure no bar owner will, either. Who wants to be known as the band that will play cheap?