then you will get penalised for linking to sites from all pages of your site with the relnofollow tag.
googles bots would say……. hmmm why does this site link out to about 10 (casino/poker) websites and links to them from every page lots of times, yet they all have a nofollow tag ……. hmmm this guys abusing the nofollow tag and trying to improve his serps and pr artificially.
i wish it were that simple