Caught a #2 from Manners St to Karori at about 4:15pm today, which even on a weekend schedule is every 10 minutes, but it was full before we even got to the last stop in the CBD.
Interestingly not all Metlink bus services are running a weekend schedule, because the #33 and #34 peak-hour services from Karori South and West to/from Brandon St are running, together with the daytime shuttle services from Karori South and West to/from Karori Mall. Under normal timetabling, they don't run at weekends.
Edited to clarify.