It's not a slice but there's a small chocolate cake at the Boardwalk Bakery that you can get to go. I think when I got it, it was $3. I bought it on a Saturday night, brought it home on Sunday, and it went into work on Monday. The person who got it said it was excellent.
If you get cake from Boulangerie- Pastiserrie in Fance, check you box before you leave. I bought a Pralineige to go & when I got "home" to the Dolphin, it turned out to be a quiche.