When JP burger bar Grass Fed opened up back in March, some diners were turned off by the small space, which offers limited seating and no on-site restrooms. (One Yelper notes that when he inquired about restrooms, they offered to walk him over to sister/neighbor restaurant Ten Tables. "Made me feel like a toddler again," wrote the reviewer.) The addition of takeout in August allowed claustrophobic burger lovers to finally partake, and now, the final piece is in place; diners can stay at home and have the burgers come to them. Yesterday Grass Fed began offering delivery throughout Jamaica Plain via Right Coast Courier, a bicycle delivery service.