A prayer before dinner

[EgoDeath]

I don't know how to handle this.  I have two religious friends, and whenever I go out to eat with either of them this is a problem.  I meet one only at restaurants.  He always says a prayer before eating.  It makes me feel awkward, as though by waiting until he's finished I am in agreement with the prayer.  I'm not.
I have another friend who I met for dinner at someone's house.  Before we ate she said a prayer, while we all waited.  (Several of us are non-believers).  
Again, the awkwardness while waiting for her to finish the prayer.  This is just me, but I find that to be a little rude and self-serving.
I am tempted to eat before she finishes the prayer, but that would be construed as rude.
I wish I knew how to deal with this problem.  Any suggestions?

In my opinion, your friend is not taking into consideration that you're uncomfortable with prayer, so why should you take into consideration that they'd find it rude you eat before they're finished?

Actions speak louder than words. Next time, start eating as soon as your food is set down and if your friend objects and wants to pray, tell them, "I don't care to pray before I eat. But feel free to do so if you want. Thanks." And continue to eat.

Just don't make it into a bigger deal than it needs to be. Don't debate about it, don't explain yourself. Just eat your food and tell them it's okay if they want to pray.

No big deal.