Regus will hold an open house breakfast Thursday, Nov. 21, from 8 to 9:30 a.m. at the company's downtown office suites, located on the fourth floor of 699 Walnut St. The "build-your-own-parfait" bar will make its return. The event is open to all guests as part of Regus' monthly series, which will include live demonstrations of the company's video conferencing.  RSVPs are not required, but can be submitted via email to shawn.harrington@regus.com.