The Rex at Queen and University is a safe bet to see some of the jazz. As far as a jam goes, there isn't too many on the weekend, more of a weekday thing, Tuesday and Wednesday being the bigger ones. On Monday there is sometimes a jam at Tequila Bookworm at Queen and Bathurst, though I'm not certain about this week coming up. For vinyl shopping there is Sublime on Augusta and Dundas, tonnes of great jazz vinyl. There is also Paradise bound on the same street a bit north, and She Said Boom which is a on College at Augusta. There is another spot on Baldwin who's name escapes me, but Baldwin is a small street, its the only vinyl shop. On Saturday I am playing the Tranzac at 4pm and Tequila Bookwork at 9pm, so there is always that! Have fun, Toronto is a great town.