Lukas Nelson, son of Willie Nelson, plays with his band Promise of the Real this weekend. Based out of L.A. and Hawaii, this rock band provides the crowd with a more bluesy-rock sound than one might expect of the son of a country music legend. But the real question at hand is this: How much weed do you have to smoke to even compare to your father? Playing music is great, but is it basically mandatory to be high 24/7 when you are Willie Nelson’s son? See for yourself this Friday, April 13, at the Sweetwater Music Hall. 19 Corte Madera Ave, Mill Valley. $22. 8pm. 415.388.3850.