“Girls” star Allison Williams is still going strong with boyfriend, College Humor co-founder Ricky Van Veen. The couple enjoyed dinner with friends, including John Mayer and Katy Perry, who we are told looked “very happy and very intimate” during the gathering upstairs Friday night at the Lion in the West Village. After the group enjoyed dinner, a magician came out to perform tricks for the table. The festive bash went on until well past midnight.