FRIDAY: >> Please Hammer, don’t hurt ’em. Landmark R&B radio station WPGC celebrates 19 years of playing 18 jams in a row with a concert at the Verizon Center that features LL Cool J, MC Hammer, Chuck Brown, EU, Naughty By Nature, Bow Wow, MC Hammer and Lisa Lisa. Apparently Cult Jam had previous commitments. $45 – $70, 7 p.m. (Kyle Gustafson) >> You may have missed La Didone last weekend, but if you…