On Friends who played roommate after Chandler moves in with Monica?

After Chandler moves in with Monica, there isn't a specific roommate situation in the Friends apartment.

* Joey continues to live in his own apartment across the hall.

* Phoebe lives in her own apartment, which is implied to be somewhere else in the city.

* Rachel initially moves in with Monica and Chandler after she breaks up with Ross, but she eventually gets her own apartment.

So, after Chandler moves in with Monica, the remaining roommates basically live in their own separate apartments.