After our rehearsal dinner plans at a different restaurant fell through, we talked to the GM at Christopher's at the suggestion of the staff at West Side Lounge. (The two restaurants are owned by the same people.) Christopher's quickly helped us plan a dinner for 40 people in one of the private rooms on their second floor. The menu was open to our guests and the wait staff was very attentive and friendly. Christopher's is right across from Porter Square T stop which was great for ease of transportation for our guests.
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