Gouranga Mantra Meditation Meetigs

I have a questions???? I practice anapanasati meditation and generally I'm interested in theravada buddhism. In my home town there is no any theravada meditation group but it would be nice to practice some group meditiation. Yesterday
I participated in new meditiation meeting at local library, but it's not a buddhism group. It has some yogic vibe. They practice mantra meditation and kirtan(singing together with guitar accompaniament). They use phrases from this leaflet on photo. They are planning to organize such meetings every week. I think people there are nice, but it's nothing about buddhism.

My questions is: Is it good to have my own everyday buddhism practice at home and join this group once a week to spend some time with people interested in spiritual growth or it's better bot going there anymore? Thank you on advance for your answers ????