Homo fascists have no power over WHAT a business sells. Every cake owner in the country can write "One Man, One Woman" on the side of their cakes - every wedding cake they make. Once it's the only style cake they make, if the homos don't want it, they'll have to find a lower life baker.
The same applies to florists. Print a cross on every ribbon, or put some Holy water in the vase (make it well known), or add a small red rose bud to every wedding bouquet to represent the heart of Christ. If they don't sell any other non-faith type of flowers, and the homos don't like it, they'll have to go to a lower life florist who'll sell something else.
Of course, there are plenty of straight couples that wouldn't want a politicized statement like that on their wedding cake (and plenty of same-sex couples that consider themselves "Christian," so wouldn't mind a cross/etc on their cake/bouquet/etc.)