Cessna 150/152's have the static port on the left fuselage side only. All other Cessna's I'm aware of have at least two static ports, left and right, interconnected. Newer Cessnas with G1000 have four static ports. Any flying you do which causes an angle off approaching 20 degrees for the pitot tube or static port introduce noticeable errors. Interconnected static ports greatly reduce the effect on the static side of the instruments. Very specialized or swiveling pitot tubes reduce this effect for airspeed readings, but are generally not worth the trouble and expense.
