OK so the invites are out, w have a few evening ones, when should these be sent out?
Now sure makes no difference people will still have to plan.
This is true, might sort them out this week so.
I'd send them all in one go, people might get talking to others & think they are an after thought or something. Invitations are tricky business, although that sounds ridiculous people are really funny about weddings so post them ASAP is my advice.