>> Diddy’s in town tonight, which means only the most masochistic of locals will be waiting in line to get in to new nightclub Ibiza. Our advice? Stay out of the 1/2 mile radius around 1222 1st Street NE completely starting from 10 p.m. to around dawn. It’s just going to be too full of desperate people looking to catch a glimpse of the party host — like a Saturday night in Adams Morgan…