DATING ADVICE PLZ - Should I call or is he just not that into me? Please read info below.?

Hi and thanks for reading (and answering my question). On Sat, (4/22/09) some acquaintances of mine showed up to my office's annual marketing event/barbeque with their bfs. They also brought a third guy whom they introduced me to then quickly went away so he and I could ';get to know eachother';. I had no idea they were going to do this so of course I was unprepared. The acquaintences asked me out to dinner with their group that night (which included the guy they brought top the event). We were all going to follow one another from the event to the bar/club and since i was following him, he gave me his number in case I got lost. The cars separated and I called him. (This means my number should be in his phone, right?) He and i sat next to eachother and hung out but didn't get to talk too much because one of the girl acquantances was pretty drunk and kept talking to me about work all night. He was really sweet during dinner, and because he found out I'm a vegetarian, he picked out the chicken from his meal then shared some with me. At the end of the night he walked me to my car and gave me a hug. I reminded him about the concert I'd brought up at dinner (which is this weekend, exactly 1 week from the night we met) and told him to call me if he felt like going to it. No call or any contact yet. What should I do??? I am interested in getting to know him better. I liked him based on the short hours I spent with him. Guys, your input would be really appreciated here. He should have my number and i did say to call me if he wanted to go to the concert but the time is so short now to get tickets...does this mean he's just not interested? Or, because he gave me his number do you think he wants me to call him? I haven't dated for a while so I'm not completely up to date on the ';rules';... Please advise.DATING ADVICE PLZ - Should I call or is he just not that into me? Please read info below.?
Call him. If he doesn't want to go, then he'll make up some excuse about being busy and you'll probably get the hint. Good luck! =)