During the summer months, the royal botanical gardens becomes host to the Moonlight Cinemas. As you watch the sun set on your picnic rug or hired bean bag lounge, a giant inflatable screen rises in front of the lake before your eyes. They show a wide selection of new release and classic movies. The moonlight Cinemas is BYO food and drinks (including alcohol) which can make it a really cost effective evening out, but they also sell drinks and hot and cold food on site. My recommendation is to spring the little extra for the gold grass tickets - this will get you a guaranteed bean bag up front, with helpful staff to bring you food and drinks - and that way you don't have to worry about getting there super early to get a good spot!