I found few additional Twitter URL :
Fort Lauderdale Marriott North
https://twitter.com/FtLaudMarriottN
Marriott Plano at Legacy Town Center
https://twitter.com/marriottplano
Nashville Marriott at Vanderbilt University
https://twitter.com/VandyMarriott
Marco Island Beach Resort
https://twitter.com/marcomarriott (instead of MarcoResort)