Want a little summer lovin’ – Travolta-style, that is? Show up in Grant Park tonight from 8:03 P.M. to 10:15 P.M. and fulfill your wishes with the Chicago Outdoor Film Festival’s presentation of Grease. Held in the park every Tuesday until August 26, the festival kicks off at sunset and is the perfect way to enjoy classic entertainment, the backdrop of the Chicago skyline and the great outdoors. Please note that, while free, this event doesn’t include any rain dates, and pets and alcoholic beverages are not allowed. (So, just pet Fuzzy on the head and enjoy your glass of merlot before you head out.) That said, you can bring lawn chairs or a picnic blanket, some tasty eats and your very best listening ears, so you can hear your pal John belt out his most famous hits before his days as Edna Turnblad in Hairspray.