Muni runs six Muni Metro light rail lines (J, K, L, M, N, and T), plus a shuttle service (S). The M and T are normally interlined; trains switch designation at West Portal station (inbound) and Embarcadero station (outbound). The K and L are interlined with a switch at West Portal; trains do not enter the subway. The S Shuttle operates as additional subway service at peak hours, and to serve events at Oracle Park (primarily San Francisco Giants games) and Chase Center (primarily Golden State Warriors games).