I've lived in Somerville for the past three years. I know about--and frequent--all the usual "gourmet" ice cream joints: Christina's, Herrell's, J.P. Licks, Tosci's, etc. However, I'm on a bit of a nostalgic quest to track down real soda fountains. Sit-down places, not side-of-the-highway dairy barns. Places where, ideally, the milkshakes come in tall glass cups, with any extras in a frosted aluminum can, and the sundaes are in glass dishes. The places can bear the stamp of any era: I don't really care if they've got marble Victorian-esque tables or leather booths from the 1950's. I'm just looking for something real and good (I've already been to Brigham's in Arlington Heights and Cabot's in West Newton). Ideally, I'd love to track down what, for me, is the Holy Grail of soda fountains: the pharmacy soda fountain (ala the two side-by-side ones on Nantucket). The ice cream needn't be homemade, but they should know how to make a killer malted and a tin roof sundae. If anyone knows where to find anything like this in the Boston area, or elsewhere in Massachusetts (I've got a car), I'd be forever grateful.