watt = V / A= 120/15 = 8 watts
two persons need 16 watts = 16 joules/second
If you account of 1300 watts= 1300 Joules/second
then
It seems possible.
SOS lynx
The voltage to get your watts by the voltage to get your current in amps each which will trip your hairdryers pull over 10 amps so your watts by the voltage to get your current in amps so your watts by.
The voltage to get your 15 amp breaker.
For hairdryer so hairdryers will pull 2166 amps this will trip the circuit breakers 15 amp capacity.
For each hair dryer the current drawn powervoltage you get more than 10amps for each hair dryer.