we have https://satellite.earth

amethyst the android client also supports these communities, they are more curated topics more reddit like

we have a channels nip in the protocol for group chatting… I think we will eventually see a discord like client link these together for groups

be sure to use a browser extension when exploring web clients:

nostr:note1c9d77spr0aydwapl5wg7xpcpw8zuxfykxfur6khr5htsycg359vqzqr2kp