“Larry Poons: Five Decades” at Jacobson Howard Gallery until June 8 (19 E. 76th Street, between Madison and Fifth Avenues, 212-570-2362) “Robin Richmond: Sacred Geographies” at Paul Sharpe Contemporary Art until June 5 (86 Walker Street, between Broadway and Lafayette Street, 646-613-1252) “Eric Holzman: The Sky Is Crying,” at Jason McCoy Gallery until May 31 … Continued