One of Long Beach’s hottest musical venues will turn 20 years old this month and it’s celebrating the milestone birthday with a weekend of music that includes rocking mariachis and a punk legend.

Alex’s Bar will mark two decades in the concert business with a Jan. 24 concert that includes San Pedro’s own punk legend Mike Watt and The Secondmen along with Mariachi El Bronx, the mariachi side project of L.A.-based punk band The Bronx, and indie-rocker Nina Diaz.

On Jan. 25 The Bronx return with a more straight ahead punk show along with punk and garage rockers The Creepy Creeps and San Diego band The Schizophonics.

The East Anaheim Street bar opened Jan. 27, 2000 and since then has become one of the city’s busiest live music venues with concerts four nights a week in genres that include punk, ska, roots, indie, reggae, Latin and rock.

It’s hosted acts like such as Offspring, Black Flag, Eagles of Death Metal, John Doe of X and Foxboro Hot Tubs, a Green Day side project.

If you go

When: 8 p.m. Jan. 24 and 25

Where: Alex’s Bar, 2913 E. Anaheim St., Long Beach

Cost: $25 each night, 21 and older only.

Information: alexsbar.com