The members of Samizdat are not going to have significant trouble getting through the check points and getting to the rendezvous point. Adam, on the other hand, will want to keep up with them just to make things simple. Use a Biocell or two to recharge if you are getting low on power. You will want to cloak periodically while slipping through this area.
Once on the streets, keep to the left-hand side of the area. You will easily be able to avoid detection using the stairs leading down toward the metro station to avoid a dense cluster of officers. Keep to the left from there, going between the building and the vehicles on that side. Try to keep somewhat in the group of the disguised escapees.
At this point, you are almost there. The disguised escapees will have no trouble reaching the destination. The final portion of sneaking can be very difficult. This can be done without cloaking, but is made significantly easier with it. With cloaking, you can go from the front of the police car, activate the Glass cloaking, and sneak into the cleaners.
Without cloaking, it is a matter of timing. From the police car nearby the building, you will need to wait for both the nearby police officer to look away and the nearby turret to be looking away. When they are, make a break for the base of the turret. Quickly work your way around to the turret's right-hand side.
Inside the cleaners, talk with the one that you did not activate the permit of. They will have something to say about the situation in the city.