Just trying to find the standard codes for the # of outlets for each breaker for the typical amperage...

15 amp 110 volt
20 amp 110 volt

the space is 12 x 20 ?

What will the space be used for? Some areas such as a dining room needs 20 amp circuit with #12 wire. A den can use 15 Amp with #14 wire.

Certain rooms need GFI protection, others need Arc Fault protection.

There is no limit of outlets on a residential general purpose circuit.

You may use the non-residential limit as a guide line of 10 outlets on 15 amp circuit and 13 outlets on a 20 amp circuit.

It is more of a game room a refrigerator TV radio table lamp Ceiling fan and it may later on have a a/c window unit

I would use a 20 amp circuit if you intend to power the entire room off the one circuit,

You may also consider adding an extra designated circuit for the "future" a/c unit. It is easier to prewire now than to attempt to add later if needed.