Only a guess here, but I would agree with most of the responses and say not that common.
Most of the guys I know and have known just would not pull the trigger on going to an escort.
To me, it was simply never that big of a deal, but to most other guys it really is a big deal.
They need to be "wanted".

To them, an escort is something they experience
maybe once at their bachelor party, and even then only because their friends expected it of them and they are near blackout drunk.