The phrase "acting as host" is correct and usable in written English.
It can be used when describing someone who is serving in the role of a host for an event or gathering.
Example: "During the conference, Sarah will be acting as host, welcoming all the attendees and introducing the speakers."
Alternatives: "serving as host" or "functioning as host".
Dana Chivvis makes regular appearances, often acting as host Sarah Koenig's investigative copilot.
Ms. Castle, fresh from the performance and acting as host, put the reason for honoring Sills best.
He also accused Bernice of corrupting their father's legacy by acting as host of an anti-gay-marriage rally at the center.
Headlining and acting as host of the event will be Jason Alexander, of "Seinfeld" fame, who originated the role of Joe on Broadway.
But acting as host of a presidential debate is "an expensive proposition," he told The Associated Press, "and presents enormous strategic challenges.
But the allure of acting as host to the summit meeting, with its economic benefits, proved sufficient to help persuade local Okinawan officials to accept the relocation plan.
The key feature of the crystal structure of 1 is the formation of hydrous potassium dichromate [K10(Cr2O7)2(H2O)2]6 + 2D units acting as hosts for guest |(UO2)(CrO4)4 |6 − clusters.
Trees surrounding the affected trees may also be acting as hosts, however, and so as many as 4,000 will have to be brought down by the spring, said Jeff Beach, a spokesman for the Agriculture Department.
Highly water-soluble, neutral dendrimers appended with, grown from, or acting as hosts to specific molecules give rise to a wide variety of biomedical applications such as drug delivery systems and MRI imaging agents.
The Sylvester house had a spray of dogwood (substitute for the original evergreen tree) attached to the ridgepole as a signal for the sandwiches & liquor provided by the Sylvesters who were acting as hosts.
Several executives said their corporations had stopped giving soft money because they had found better use of their resources, like lobbying, contributing to political action committees and acting as hosts for fund-raising events.
