COMEDY: Demetri Martin (pictured) and some (we hear, A-list) friends will be delivering some new material tonight at Rififi. Can't make it? He'll be back the 20th, 27th and June 3rd. 10 p.m. // Rififi [332 E 11th St] // $5 EVENT: Sure, YouTube is good for a laugh or two during the workday, but as an artistic muse? Artists Sue de Beer, Matthew Higgs and Matthew Ronay have all (against all odds) found art......