In my diocese I know of precisely zero parishes with regular Vespers services and I know of zero lay groups devoted to its recitation.
"After the sacrifice of the Mass, the Church possesses no treasure so great as the Divine Office." "It is God's Church, the Spouse of Christ, who has done me the honour of choosing me for this great work - me, in preference to a hundred others. She puts into my hand her holy book of heavenly language, and asked me to read it words before God, to unity with the angels and saints in honouring God."
St. Alphonsus Liguori