Clutter is fine, groups of young men hanging around the parking lot and hallways, not so much. The range of incalls used is amazing actually.
I've certainly not met as many ladies as many of the gents here, but I don't read of many really, really nice incalls.
My muse Lindsey's incall is in a very quiet secluded area, is beyond immaculately clean, and is complete with fully stocked bar,variety of teas and coffee, piles of freshly laundered towels and washcloths, tastefully yet simply decorated, and fully equipped with a selection of toys, condoms and paraphernalia.
Certainly most ladies either can't afford to maintain such a place just for work/play or choose not to, but it really is a big step above most I've seen or read about, and certainly adds to the value of visiting her.