Quick way to play two or more Pbinds together

Simply enclose all of them within a single code block:

( // open big block
Pbind(
    \freq, Pn(Pseries(110, 111, 10)),
    \dur, 1/2,
    \legato, Pwhite(0.1, 1)
).play;

Pbind(
    \freq, Pn(Pseries(220, 222, 10)),
    \dur, 1/4,
    \legato, Pwhite(0.1, 1)
).play;

Pbind(
    \freq, Pn(Pseries(330, 333, 10)),
    \dur, 1/6,
    \legato, 0.1
).play;
) // close big block

For advanced ways of playing Pbinds simultaneously and in sequence, check out Ppar and Pspawner.