Whenever my carless friends and I rent a Zipcar, we always seem to find ourselves at a chain restaurant. Something about being behind the wheel brings us back to our suburban roots, and we want to pull into a parking lot and wait at the bar with one of those coasters that vibrates when our table is ready.

I’ve recently been on a run of chain Mexican joints and after a day of outlet shopping on Saturday, we decided to hit Margarita’s in Waltham. While we sat at the bar, we had a conversation about which is better: Margarita’s or Border Cafe?

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