First, I am sure the disclaimers all state it, but to re-emphasize there is no sex. Second, If you're looking for somebody else to tell you it's OK, that's the wrong approach ... that somebody should only be you. So long as your true intention is not cheating and you have every intention of staying loyal to the one you love, cause you love them, indulging in an interest I do not see as cheating.
If you've been wanting to experiment and try this all your life, to not do so would be something you'll back look on forever. In addition, this really is quite a "life changing experience" for some. It was for me.
In an ideal world people would not look down on BDSM, and we can all tell our SO and friends, and they would understand. But this is far from the case ... especially in America. Unfortunately, a man would be seen as inferior, degenerate, repulsive because he enjoys being at the underfoot and paddle end of a woman or cross dress despite the fact that he may at the same time be the commander of his personal, professional and social and love life and a humanitarian to boot. I think we all live a bit of a double life when it comes to BDSM, unfortunately.
I currently only know of two women in my life that would even understand a man being into BDSM. And these are the only two who would not see this as cheating. They are rare very open minded women who do not see the world in just black and white. Some SO's see everything as cheating.
If you have problems being honest with your SO about going out with the guys for a drink and coming home late, late nights of poker (even if you win), going skydiving, going to the strip club, etc. then you definitely don't want to mention a house of bondage. ( I just itemized what my friend's get in trouble with ... so sad)
But again to deprive yourself of something you are interested in would be just that. I say give it a try. It's an hour, and the Dominas are experienced enough to know more than you and know what your range is. Your job is to know your initial interest and more importantly your initial limits ... which you should be willing to push, and the Dominas will know when to stop for your safety.
Be honest to yourself.