Billed as "the funniest and most tuneful Church Basement Ladies yet," A Mighty Fortress Is Our Basement had me laughing more than I expected to during Friday night's performance. Having had a too-hearty helping of the first two Lutheran-themed kitchen musicals, I couldn't help but have low expectations for the Circa '21 Dinner Playhouse's production of this fourth show in the series. Yet while this sequel still falls into some of the expected traps, it also had enough humor - and one especially entertaining song - to keep me amused.