I visited the Hot Box Cafe as a non-smoker, hanging out this Sunday just past with a visitor to Toronto who had visited this place at its Baldwin Street location and liked it. I like the place, too, simply as a place to hang out if you want to smoke a joint, or hang out with people who do.
The cafe, located behind a store, is shabby but fairly clean, with a patio well-stocked with furniture (chairs and benches, tables, et cetera). The $5 entry fee still applies. I'd not go back unless I was with someone who wanted to smoke a joint, but it struck me as a comfortable and safe place to do so.