A bit late, but here goes: we have tickets to the MoS for 11:30 tomorrow, expect to spend a couple of hours, so will probably want a substantial meal around 2-2:30, the end of the lunch hour.
The route home can go through East Cambridge or back around Mem. Drive.
Looking for something interesting, but specifically for restaurants that stay open through the afternoon, not closing between lunch and dinner. We can probably get subsistence grub at the Museum, but would prefer something more adventurous.