Ted Belanoff
Berkeley
Live, interactive chess lessons from Grandmasters for about $2/hour: https://killerchesstraining.com/
Clubs
Chess.com Legends Club
2 593 329 Members
USChess
65 786 Members
USChess - Members Only
3 356 Members
NM Coach-Bill's Free Video Lessons
45 656 Members
Chess.com Verified Titled Players
10 215 Members