are the mp's still safe to visit? Or will Uncle Sam bust the doors down? Im paranoid.

MP's are safe if they are staffed and run by sensible people who are professional and discreet about their business ;o)

If you can tell by the look of the place or the therapists (and some can be pretty obvious) that you're going to 'score' so can LE... and you can bet that they're aware of it and keeping an eye on it. Don't become part of what they're keeping an eye on.