Mike Barnes & Friends w/ Tony Black & Mike Rhodes plays Sovereign Kava on Friday, October 9 at 8:00 PM. Get there a little early if you want a good spot. Sovereign Kava keeps the door free, every show, every night, so the only thing lighter than the cover is the kava buzz. The South Slope spot has been pouring plant-based drinks since 2010, and whether it's jazz, folk, or one of the weekly open jams, walking in costs nothing but your time.