Single on V-Day Eve? Dating expert Stef of Stef and the City might have some advice. Swing by her young professionals mixer Feb. 13 for a cocktail hour at 6 p.m. with free appetizers, followed by a 7 p.m. presentation of Stef's tips and tricks for meeting that special someone. Tickets are $30 at the door and include two drink tickets and a crowd of eligible singles.