If I had a friend who had just left a cult and was looking for better answers, I'd invite him to my church, sit with him as my guest, then treat him to lunch afterward and let him ask whatever questions he wanted, or just vent.
I wouldn't pressure him into a second week if he didn't want it. We're also what counts as a megachurch in Canada, so he would hardly even be noticed in the crowd, let alone singled out for unwanted attention. (Big churches do have their advantages as well.)
Basically, if he was liable to walk away from faith entirely, I would at least want to give him a chance to see a perfectly mainstream evangelical church in action that isn't going to put any undue pressure on him to join. If he's just kicked heroin, I don't want to be perceived as trying to get him hooked on codeine instead.