Conn. Gen. Stat. § 47a-31: (Formerly Sec. 52-539). Illegal use of premises voids lease.

When the lessee or tenant of any house, room, tenement or dwelling unit is convicted of keeping a house of ill-fame therein, resorted to for the purpose of prostitution or lewdness, or of a violation therein of any law against gaming, the lease, contract or rental agreement for letting such house, room, tenement or dwelling unit shall thereupon be void; and the lessor may recover possession of the premises in the manner prescribed in this chapter, but notice to quit possession shall not be required.