[3] Guerite's stage credits included roles in Mr. Wix of Wickham (1904),[4] The Gay White Way (1907–1908),[5] The Orchid (1907–1908), Mr. Hamlet of Broadway (1908–1909),[6] A Broken Idol (1909),[7] Dick Whittington (1910),[8] Get Busy with Emily (1910),[9] The Girl in the Taxi (1910),[10] and Peg O' My Heart (1917).

[16][17][18] She designed her own gowns[19] and wore the "latest Parisian creations", as reported in the entertainment press: "Miss Guerite need never hesitate to don any costume that shows the grace of her lines, for she has undoubtedly one of the best figures on the American stage.

"[20] She contributed a recipe for preparing Brussels sprouts and chestnuts to a 1918 actors' cookbook, to raise funds for war relief.

In 1910, Guerite, her husband, actress Edna Wallace Hopper and two others ran their motor boat, named the Laura G., aground at Little Hell Gate and almost sank.

[23][24] Two years later, again in her namesake motor boat, she and another actress, Rose Parnett, interrupted their tennis game to rescue thirteen men from a foundering yacht, the Count, in Flushing Bay.

[30] "I wish I could wear trousers all the time," she explained of her practical aviator gear, "Women are adopting them all over England and France.