No costume? No problemSome readers have told us our Halloween masks were a little too frightening. If you're still scrambling to pull together a costume, here are four options that are more treat than trick. Best of all, you'll be able to get what you need from your own closet.

No costume? No problem

What to wear: Khaki jacket and black turtleneck Who you are: Rick Astley How to play the part: Memorize "Never Gonna Give You Up." You'll be singing it all night.

No costume? No problem

What to wear: Shower cap, towel, iPhone Who you are: "Naked Conversations" author Robert Scoble How to play the part: Engage everyone in conversation. Ask them if they want to get naked. Hope they don't take you up on it.

No costume? No problem

What to wear: Three-piece suit Who you are: Mashable CEO Pete Cashmore How to play the part: Make sure you have a girl on each arm. Tell everyone you're a blogger. Refuse to explain what you actually do.

No costume? No problem

What to wear: Jumpsuits and aviator glasses for two Who you are: Larry Page and Sergey Brin How to play it: Maverick and Goose? So old media. With a fighter jet parked at Moffett Field, Larry and Sergey are the Valley's new Top Guns.