If you know of others who believe in, and who are walking and living in, the same Biblical truths, and you both are close to one another, then according to 1 John 1:7 you can and should fellowship together with each other.
Kung may kilala kang iba na naniniwala, at lumalakad at namumuhay sa kaparehong katotohanan ng Biblia, at kayo ay parehong malapit sa isa't isa, kung gayon, ayon sa 1 Juan 1:7, maaari at kinakailangan kang makipagtipon sa kanila na kayo ay magkasama.