It’s possible to have too many people at your party, as we learned at John Varvatos’s soiree the other night celebrating the designer’s new boutique at Copley Place. What was billed as an “intimate” get-together was actually a bit of mob scene, with a whole lot of square glasses, unshaven jowls, and scarves. Dapper Celtics guard Rajon Rondo was bartending at the back of the store, but the prospect of shouldering our way in his direction seemed daunting. Calling himself a “sports junkie,” Varvatos said he’s a big fan of Rondo’s, both on and off the court. “He’s such a warm, low-key, but powerful guy,” said the designer. “I’ve been intrigued with him since he started playing eight years ago. . . . It’s the way he carries himself. There are people who just ‘do,’ and he’s one of those people.” After the party, Varvatos and his VIP crew, including Rondo and Pats receiver Julian Edelman, headed to Trattoria Di Monica in the North End for dinner. What happened next is strange. When people were finished eating, we’re told, Cristiano Quieti, the CEO of John Varvatos Enterprises, put a napkin around his neck and had his hair cut — right there at the table — by Pini Swissa, the Newbury Street stylist who also does Tom Brady’s hair.