Men at Play is the best suit porn site out there. It consistently updates with sexy handsome men in fresh new situations. If you are a fan of tuxedos, suits, ties and dress clothes in general on hot muscular guys...you won't be disappointed with a membership to this site.

Men Hard at Work is a great site featuring young attractive guys wearing suits and screwing each other.  The boys range from college jocks to masculine hunks.  Unfortunately, this site has stopped updating for the time being.  It does feature well over 100 videos, though.  So feel free to sign up and enjoy what's there until the updates start up again.

UK Naked Men is a site featuring hunky studs from the UK stroking their (mostly) uncut dicks and fucking ass.  Though this site doesn't focus exclusively on suits, it does have alot of pictures and videos of guys in suits and ties getting off.  Definitely worth a look if your into the rugged and handsome type.

Hot House is a pretty hot professional porn production company.  Their site is filled with hot hunks fucking and sucking, but not all of the guys are wearing suits and ties.  There is a good selection of dudes at work, or in dress clothes though...definitely enough to keep you busy.  Be sure to check it out.