Hotel recomendations please

Not downtown. Hilton Suite in Markham. Room for 20+, no balcony. I know downtown Hilton has similiar biz suites but no balcony.

Not sure if Cambridge Suite has balconies.

If you want Outdoorsie, may consider Condo party room. My LF's condo party room is on top floor, opens out for BBQ. Great view of Lake Ontario during fireworks.
 
Does there need to be room for 15 *on the balcony*?

If not, check out the Westin Harbour Castle, too. I've stayed in rooms there with a balcony in the past.