I've always liked the idea of it, and reckon the mrs would probably enjoy it even more than me. But what mostly puts me off trying is fear of the risk of diseases, the bloody silly and uncomfortable looking fetish clothing that seems to be obligatory at swingers parties.. and no desire whatsoever to get into such close proximity with other mens hairy arses, wedding tackle, and ejaculate.
apart from that, its still a good fantasy on a dreary thankless day at work.