Has anyone had any success in convincing a spouse that wants to end marriage (we have no kids) to attend Retrouvaille (through the church, it is a retreat weekend for separated couples on the verge of divorce)?

I don't know that he'd go under the purpose of saving marriage, but perhaps more to healing regardless of which way we go? The program is Sept so I feel like I need to mention this weekend since he's gone for 2 months this summer (he already has materials on it but said 'what's the point if i've already made up my mind') as it's only a week after he gets back.

I thought of maybe saying 'ok, i hear where you are and respect your decision..i just ask that you attend this as our final attempt to see if there is a chance, or to improve communication/friendship if we do end...' and if you still want out afterwards i respect that. It has a 80& chance of saving troubled marriages - maybe couples have already filed for divorce when attending - so I feel if I can get him there there is a shot.