If you (or maybe those other folks) have a list of reason for not doing TDD, bring 'em (the reasons and those people). Regardless of who or what reasons you bring, bring your laptop. We'll have some fun.
About Bob Allen:
Coded in the day of "mini" computers that morphed into mainframes. Agile acolite/coach. Getting developer mojo back by actually coding (and hanging with folks smarter than me).