For the rock kids, Sahara Hotnights is playing at Spaceland with Run Run Run, who is the club's resident band for September. According to the band's website, Sahara Hotnights is currently working on a fourth album (no release date in sight yet). The show is free and 21+.
The Mojo Filters are also playing resident rock band this month. Every Monday night in September, you can catch them play at Zen Sushi in Silverlake. Joining them this evening are Lemon Sun and The Soundhead. It's free if you are over 21 and a few dollars if you are not.
For the dance kids, I really suggest checking out Dance Like a Machine. I'll be honest and admit that I have never attended the club on account of Monday night classes and such. However, I am acquainted with a few of the folks who have spun records here and, well, they have good taste. DJ Olie is the resident and tonight's guests are Aquavee (Create:Fixate) and Stan Min vs. Tang (Cytrax, Incision, Automatic Static). DLAM goes down at M Bar in a strip mall on the corner of Fountain and Vine. There is no cover, but it is 21+.