I agree Liza, unfortunately there are waaay too many people (mainly guys) who want to convince their spouse to do something simply because they want to do it. Remember the whole point of the lifestyle is sharing something with the person you love most, something very intimate. If you have to "convince" them to join in by pressuring them or bullying them then you aren't sharing anything and in the end you both lose out.
I think that if this is something that interests you then you should try talking to your spouse about it. If they say no, leave it at that, don't pressure and don't bring it up again.
I will say that there are cases where a person has said no only to go off and think about things on their own then bring it up again later. But the more you pressure the more your spouse is likely to back away from the idea. Remember this has to be something you both enjoy together, not something you "get your spouse to do" for your motives.
Julie
http://www.swingersboard.com