2 Rhythm Dance: Each month Owner Michele Acito switches group ballroom dance classes around. One month it’s swing, the next maybe waltz. But come November, salsa is back at 7:30 p.m. Tuesdays. Classes. That was the lean margin that saved Betty and Gene Taylor’s lives the night that two elevated walkways above the lobby of the posh Hyatt Regency Hotel in Kansas City collapsed during a crowded swing d. Catalog…