Cafe Tu Tu Tango is at its best as a celebration destination. You’ll have more fun – and the food just might taste better – if you go with a big group. Order a table full of tapas and share. Be careful: The cost can really add up fast.The Cajun chicken egg rolls ($6.25) were a favorite, with blackened chicken rolled inside a wonton skin with corn and cheese. Red onions and a touch of cilantro added just the right flavor notes.The duck and mixed greens salad ($7.25) was one I had enjoyed six years ago, and it was still good on my recent visit. It featured shredded duck meat served on flatbread atop mesclun greens drizzled with balsamic vinegar.Tu Tu’s setting is a Spanish artist’s garret, Spanish, I suppose, because for the Mediterranean slant of the menu. Every inch of wall space is occupied by paintings, drawings, sculptures and oddities, all of which are for sale. Should you purchase one, another will be slapped up in its place in no time flat because there are artists in residence dappling, scribbling and shaping new works of art right before your very eyes. According to literature distributed by the restaurant, it isn’t uncommon for a guest to sit down and see an artist staring at a blank canvas. But by the time dessert is finished the artist is signing his or her name to a finished piece. Some of the art looks as though it was completed that fast, but having the artists working there among the diners is part of the fun.