Post Alarm Systems will host its third-annual Tri-Chamber networking mixer with the Arcadia Chamber of Commerce, the Duarte Chamber of Commerce, and the Monrovia Chamber of Commerce on Thursday, July 19 from 5:30-7:30 p.m. at 47 E. Saint Joseph Street, Arcadia.

Admission is $10 for members and $15 for non-members. There will be an outdoor BBQ and DJ, along with raffle prizes.

To purchase a ticket, to add your organization to the approved list, and for additional information, contact the Chamber at 626-447-2159.

For information on this event, see the Journal's Business Section under "Small Bussiness News and Information."