Yes anywhere. I do it while showering. You can do it while walking down the streets. Anywhere. I in fact recommend you to do it.
“The Rosary is a powerful weapon to put the demons to flight and to keep oneself from sin…If you desire peace in your hearts, in your homes, and in your country, assemble each evening to recite the Rosary. Let not even one day pass without saying it, no matter how burdened you may be with many cares and labors.”
Pope Pius XI
“You always leave the Rosary for later, and you end up not saying it at all because you are sleepy. If there is no other time, say it in the street without letting anybody notice it. It will, moreover, help you to have presence of God.”
–St. Josemaria Escriva
“If you say the Rosary faithfully until death, I assure you that in spite of the gravity of your sins, you shall receive a never-fading crown of glory. Even if you are on the brink of damnation, even if you have one foot in Hell, even if you have sold your soul to the devil as sorcerers do who practice black magic, and even if you are a heretic as obstinate as a devil, sooner or later you will be converted and will amend your life and save your soul, if and mark well what I say – if you say the Holy Rosary devoutly every day until death for the purpose of knowing the truth and obtaining contrition and pardon of your sins.”
St. Louis de Montfort