Search term fun!

One of the hits I got in the past week was "How to carry a gun in a suit."

Simple.  Same way you carry in any other clothing.  Actually, a suit can often be easier to carry in, since it has a built-in cover garment.  Suit coats work wonders for concealing shoulder holsters, as well as OWB and IWB rigs.

I don't wear a suit very often, but I've had my very best luck wearing a tuckable IWB rig, if I was concerned about taking off my jacket.  Which, interestingly, is the same result I get in standard street clothes.

And that's how you carry in a suit.

Lokidude