Don't Go Alone

Among certain congregations, there is a minhag to appoint two people to recite Pesukei Dezimrah out loud, i.e. one person recites one passuk and a second person recites another passuk.
The reason given for this is: The chief purpose of Pesukei Dezimrah is to "cut" ("זמרה" shares a root with "זמר - to cut") all the prosecutors that attempt to thwart our tefillos. Thus, should one say these pesukim alone, he is subject to danger. By joining forces with another person, they are now a team and protected from all harm.
ספר החיים (אחי המהר"ל) "ספר סליחה ומחילה" ח"ד פ"ח אות ח
ועי' בס' מקור חיים (לבעל החות יאיר) הל' ברכות סי' נ"א בסופו
See here
To be continued...