One-third art gallery, one-third science project and one-third, well, happy sleep over, this off-the-beaten path B&B is a real charmer. Priding itself on being eco-friendly, guests are given explicit instructions on how to use the bathrooms, as much of the water is re-used, and heated by solar power. Around the house are exquisite pieces by local Mexico City artists, mixed with folk art that one of the owners brings back from across Mexico (he does social work with indigenous Mexican tribes). As for the "sleep over" aspect, that comes from the homey, friendly welcome of the staff here who are simply delightful people, and will quickly make you feel like and old friend. You can feel the love they've put into the design of the rooms, each of which is high ceilinged, spotless and will have some special element--a homemade canopy over one bed or a long, artful mobile hanging from the ceiling. Final plus: the included daily breakfast, a two-course feast (a bowl of sliced fruit and yogurt, followed by a different Mexican breakfast specialty each day) is really delish. Though on the edge of Mexico's central district, 77’s neighborhood is safe, and the B&B is a 5-minute walk to a metro station, making it convenient for sightseeing. Note: Patio gets a large number of gay guests (many on the staff are gay), but is welcoming to all.