I think it would be fun to photograph street art/murals around town. This could actually be broken up into several meetups in different parts of town. Baylor Street would be a great place to start. Burnet Road also has a lot of buildings with murals. I've seen lots of interesting street art east of 35 around 5th and 6th street and there is also a lot downtown and around the university. I'm sure photographers in the group would have other suggestions.