Need bit of help/suggestions

As some of you know ive had to make last minute changes with our ceremony etc.
we are getting married away from home.
So the wedding ceremony is now 3.30 at a registry office, not sure how long this will take, guessing hour ish??

Then we have a social club booked for early evening.

But what can I do In between this time???

We will go off for some photos. But what about guests?

Because we had to change venues, where we are stopping isn't close by so can't do a freshen up time.

And with everything that's gone on I dont even know who will be coming!! But really need to have something in place!

Don't want to book somewhere to eat as having buffet with the social club.

Any ideas or has anyone a better idea of timings or done this themselves??

Thanks xx